chore(deps): bump actions/cache from 5 to 6

Bumps [actions/cache](https://github.com/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
...

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

Author: dependabot[bot]

.github/workflows/php-code-analysis.yml

@@ -82,7 +82,7 @@ jobs:
                     echo "plugin-dir=$(pwd)" >> $GITHUB_OUTPUT
                     echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT
 
-            -   uses: actions/cache@v5
+            -   uses: actions/cache@v6
                 with:
                     path: ${{ steps.composer-cache.outputs.dir }}
                     key: ${{ runner.os }}-composer-${{ hashFiles('${{ steps.composer-cache.outputs.plugin-dir }}/composer.lock') }}

.github/workflows/php-unit-tests-shopware.yml

@@ -98,7 +98,7 @@ jobs:
                     echo "plugin-dir=$(pwd)" >> $GITHUB_OUTPUT
                     echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT
 
-            -   uses: actions/cache@v5
+            -   uses: actions/cache@v6
                 with:
                     path: ${{ steps.composer-cache.outputs.dir }}
                     key: ${{ runner.os }}-composer-${{ hashFiles('${{ steps.composer-cache.outputs.plugin-dir }}/composer.lock') }}