Bump the github-actions group with 3 updates

Bumps the github-actions group with 3 updates: [actions/checkout](https://github.com/actions/checkout), [actions/cache](https://github.com/actions/cache) and [actions/upload-artifact](https://github.com/actions/upload-artifact).


Updates `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)

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)

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

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -27,7 +27,7 @@ jobs:
       CFLAGS: "-march=x86-64 -ftree-vectorize -fopt-info-vec"
       CXXFLAGS: "-march=x86-64 -ftree-vectorize -fopt-info-vec"
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Install Valgrind
         if: matrix.valgrind == '1'
@@ -37,7 +37,7 @@ jobs:
           echo "PHP_BUILD_CONFIGURE_OPTS=--with-valgrind" >> $GITHUB_ENV
 
       - name: Restore PHP build cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         id: php-build-cache
         with:
           path: ${{ github.workspace }}/php 
@@ -87,7 +87,7 @@ jobs:
 
       - name: Upload test results
         if: failure()
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: test-results-${{ matrix.php }}-debug-${{ matrix.debug }}-valgrind-${{ matrix.valgrind }}-zts-${{ matrix.zts }}
           path: |