build(deps): bump the github-actions group with 3 updates

Bumps the github-actions group with 3 updates: [actions/cache](https://github.com/actions/cache), [actions/upload-artifact](https://github.com/actions/upload-artifact) and [peter-evans/create-pull-request](https://github.com/peter-evans/create-pull-request).


Updates `actions/cache` from 4 to 5
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v4...v5)

Updates `actions/upload-artifact` from 5 to 6
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v5...v6)

Updates `peter-evans/create-pull-request` from 7 to 8
- [Release notes](https://github.com/peter-evans/create-pull-request/releases)
- [Commits](peter-evans/create-pull-request@v7...v8)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: peter-evans/create-pull-request
  dependency-version: '8'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/cache-build.yml

@@ -32,7 +32,7 @@ jobs:
       # Registry login step intentionally missing
 
       - name: Cache Docker layers
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: /tmp/.buildx-cache
           key: ${{ runner.os }}-single-buildx-${{ github.sha }}

.github/workflows/smoke.yml

@@ -43,7 +43,7 @@ jobs:
         run: meson test -C builddir --suite short
 
       - name: Upload testlog
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: success() || failure()
         with:
           name: testlog.txt

.github/workflows/update-rust-deps.yml

@@ -48,7 +48,7 @@ jobs:
 
       - name: Create Pull Request
         if: steps.git-check.outputs.changed == 'true'
-        uses: peter-evans/create-pull-request@v7
+        uses: peter-evans/create-pull-request@v8
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           branch: rust-deps-upgrade