Bump actions/checkout from 3 to 4 (#15)

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/reference-converter.daily.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - run: make devtools-image
     - name: let the build create files
       run: chmod 777 .

.github/workflows/reference-converter.yml

@@ -21,7 +21,7 @@ jobs:
     env:
       testResults: ./reference-converter/results/test.xml
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: make devtools-image
       - name: let the build create files
         run: chmod 777 .
@@ -44,7 +44,7 @@ jobs:
     env:
       working-directory: ./reference-converter
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-go@v4
         with:
           go-version-file: ${{ env.working-directory }}/go.mod

.github/workflows/reference-lib.publish.yml

@@ -20,7 +20,7 @@ jobs:
       contents: read
       packages: write
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-node@v3
         with:
           node-version: '16.x'