ci: Update all imported GitHub Actions actions to silence warnings

.github/workflows/build.yml

@@ -14,9 +14,9 @@ jobs:
         python-version: ["3.7", "3.9", "3.11"]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install APT depenencies
@@ -50,7 +50,7 @@ jobs:
       run: |
         coverage xml
         coverage report -m
-    - uses: codecov/codecov-action@v2
+    - uses: codecov/codecov-action@v4
       if: ${{ always() }}
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
@@ -59,9 +59,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Set up Python 3.11
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
         python-version: "3.11"
     - name: Install Python dependencies
@@ -77,9 +77,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Set up Python 3.11
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
         python-version: "3.11"
     - name: Install Python dependencies
@@ -95,9 +95,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Set up Python 3.11
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
         python-version: "3.11"
     - name: Install Python dependencies
@@ -119,9 +119,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Set up Python 3.11
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
         python-version: "3.11"
     - name: Install dependencies