Bump actions/cache from 5 to 6 in the all-actions group

Bumps the all-actions group with 1 update: [actions/cache](https://github.com/actions/cache).


Updates `actions/cache` from 5 to 6
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v5...v6)

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

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

Author: dependabot[bot]

.github/workflows/php.yml

@@ -76,7 +76,7 @@ jobs:
         run: echo COMPOSER_CACHE="$(composer config cache-files-dir)" >> "$GITHUB_ENV"
 
       - name: Cache composer dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ${{ env.COMPOSER_CACHE }}
           key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
@@ -139,7 +139,7 @@ jobs:
         run: echo COMPOSER_CACHE="$(composer config cache-files-dir)" >> "$env:GITHUB_ENV"
 
       - name: Cache composer dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ${{ env.COMPOSER_CACHE }}
           key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
@@ -177,7 +177,7 @@ jobs:
         run: echo COMPOSER_CACHE="$(composer config cache-files-dir)" >> "$GITHUB_ENV"
 
       - name: Cache composer dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ${{ env.COMPOSER_CACHE }}
           key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
@@ -232,7 +232,7 @@ jobs:
         run: echo COMPOSER_CACHE="$(composer config cache-files-dir)" >> "$GITHUB_ENV"
 
       - name: Cache composer dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ${{ env.COMPOSER_CACHE }}
           key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}