Bump actions (#19)

### WHY are these changes introduced?

`actions/upload-artifact action@v3` is [deprecated](https://github.com/actions/upload-artifact/blob/v4.4.3/README.md#actionsupload-artifact):

> actions/upload-artifact@v3 is scheduled for deprecation on November 30, 2024. [Learn more.](https://github.blog/changelog/2024-04-16-deprecation-notice-v3-of-the-artifact-actions/) Similarly, v1/v2 are scheduled for deprecation on June 30, 2024. Please update your workflow to use v4 of the artifact actions. This deprecation will not impact any existing versions of GitHub Enterprise Server being used by customers.

`actions/checkout@v3` uses old node version, causing warnings to be emitted

### WHAT is this pull request doing?

Bumping `actions/checkout` and `actions/upload-artifact` actions.

### HOW can this pull request be tested?

If CI passes, it's hopefully fine. (`master` workflow does not run on CI though, but changes are similar)

.github/workflows/ci.yml

@@ -31,7 +31,7 @@ jobs:
             llvm_version: 18
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Login to DockerHub
         uses: docker/login-action@v2
         with:
@@ -63,7 +63,7 @@ jobs:
     needs: alpine
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: depot/setup-action@v1
       - uses: depot/build-push-action@v1
         with:
@@ -75,7 +75,7 @@ jobs:
             pkg_revision=${{ github.run_number }}
           outputs: pkgs
       - name: Upload artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: crystal-static-pkgs
           path: pkgs
@@ -115,7 +115,7 @@ jobs:
             llvm_version: 13
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2
       - name: Set up Docker Buildx
@@ -165,7 +165,7 @@ jobs:
           target: pkgs
           outputs: pkgs
       - name: Upload artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: crystal-${{ matrix.base_image }}-${{ matrix.version }}-pkgs
           path: pkgs
@@ -191,7 +191,7 @@ jobs:
             llvm_version: 12
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2
       - name: Set up Docker Buildx
@@ -241,7 +241,7 @@ jobs:
           target: pkgs
           outputs: pkgs
       - name: Upload artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: crystal-${{ matrix.base_image }}-${{ matrix.version }}-pkgs
           path: pkgs
@@ -268,7 +268,7 @@ jobs:
             base_image_tag: 40
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Login to DockerHub
         uses: docker/login-action@v2
         with:
@@ -312,7 +312,7 @@ jobs:
           target: pkgs
           outputs: pkgs
       - name: Upload artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: crystal-${{ matrix.base_image }}-${{ matrix.base_image_tag }}-pkgs
           path: pkgs
@@ -335,7 +335,7 @@ jobs:
             el_version: 9
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Login to DockerHub
         uses: docker/login-action@v2
         with:
@@ -381,7 +381,7 @@ jobs:
           target: pkgs
           outputs: pkgs
       - name: Upload artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: crystal-centos-${{ matrix.base_image_tag }}-pkgs
           path: pkgs

.github/workflows/master.yml

@@ -25,7 +25,7 @@ jobs:
             llvm_version: 16
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Login to DockerHub
         uses: docker/login-action@v2
         with:
@@ -56,7 +56,7 @@ jobs:
     needs: alpine
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: depot/setup-action@v1
       - uses: depot/build-push-action@v1
         with:
@@ -69,7 +69,7 @@ jobs:
             pkg_revision=${{ github.run_number }}
           outputs: pkgs
       - name: Upload artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: crystal-static-pkgs
           path: pkgs
@@ -91,7 +91,7 @@ jobs:
             llvm_version: 15
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2
       - name: Set up Docker Buildx
@@ -139,7 +139,7 @@ jobs:
           target: pkgs
           outputs: pkgs
       - name: Upload artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: crystal-${{ matrix.base_image }}-${{ matrix.version }}-pkgs
           path: pkgs
@@ -155,7 +155,7 @@ jobs:
             base_image_tag: 40
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Login to DockerHub
         uses: docker/login-action@v2
         with:
@@ -198,7 +198,7 @@ jobs:
           target: pkgs
           outputs: pkgs
       - name: Upload artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: crystal-${{ matrix.base_image }}-${{ matrix.base_image_tag }}-pkgs
           path: pkgs