Bump actions/checkout from 5 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/build_and_publish.yml

@@ -22,7 +22,7 @@ jobs:
   unit-test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v6
         with:
           node-version: '18'
@@ -35,7 +35,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Get current date
         id: date
         run: |
@@ -109,7 +109,7 @@ jobs:
       contents: write
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5 # not needed for the code, but needed for the git config
+      - uses: actions/checkout@v6 # not needed for the code, but needed for the git config
       - name: Download Built site
         uses: actions/download-artifact@v6
         with:
@@ -128,7 +128,7 @@ jobs:
     needs: [ deploy ]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5 # not needed for the code, but needed for the git config
+      - uses: actions/checkout@v6 # not needed for the code, but needed for the git config
       - name: Download Built site
         uses: actions/download-artifact@v6
         with:

.github/workflows/check-external-links.yml

@@ -25,7 +25,7 @@ jobs:
       statuses: read
     if: github.event.workflow_run.event == 'schedule' && github.event.workflow_run.conclusion == 'success'
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v6
         with:
           node-version: '18'