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/ci.yml

@@ -20,7 +20,7 @@ jobs:
           - containers/web/node/Containerfile
           - containers/web/python/Containerfile
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: docker/setup-buildx-action@v3
       - uses: docker/build-push-action@v6
         with:

.github/workflows/deploy.yml

@@ -22,7 +22,7 @@ jobs:
     concurrency: production
     env: ${{ secrets }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: webfactory/[email protected]
         with:
           ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY }}

.github/workflows/pg-backup.yml

@@ -17,7 +17,7 @@ jobs:
     concurrency: production
     env: ${{ secrets }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: webfactory/[email protected]
         with:
           ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY }}