Bump actions/cache from 3 to 4

Bumps [actions/cache](https://github.com/actions/cache) from 3 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v3...v4)

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

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

.github/workflows/ci.yml

@@ -59,7 +59,7 @@ jobs:
  run: echo "::set-output name=date::$(date +'%Y-%m')"
 
  - name: Cache composer dependencies
- uses: actions/cache@v3
+ uses: actions/cache@v4
  with:
  path: ${{ steps.composer-cache.outputs.dir }}
  key: ${{ runner.os }}-composer-${{ steps.key-date.outputs.date }}-${{ hashFiles('composer.json') }}-${{ matrix.prefer-lowest }}
@@ -134,7 +134,7 @@ jobs:
  key: ${{ steps.key-date.outputs.date }}
 
  - name: Cache PHP extensions
- uses: actions/cache@v3
+ uses: actions/cache@v4
  with:
  path: ${{ steps.php-ext-cache.outputs.dir }}
  key: ${{ runner.os }}-php-ext-${{ steps.php-ext-cache.outputs.key }}
@@ -160,7 +160,7 @@ jobs:
  run: echo "::set-output name=dir::$(composer config cache-files-dir)"
 
  - name: Cache composer dependencies
- uses: actions/cache@v3
+ uses: actions/cache@v4
  with:
  path: ${{ steps.composer-cache.outputs.dir }}
  key: ${{ runner.os }}-composer-${{ steps.key-date.outputs.date }}-${{ hashFiles('composer.json') }}-${{ matrix.prefer-lowest }}
@@ -200,7 +200,7 @@ jobs:
  run: echo "::set-output name=date::$(date +'%Y-%m')"
 
  - name: Cache composer dependencies
- uses: actions/cache@v3
+ uses: actions/cache@v4
  with:
  path: ${{ steps.composer-cache.outputs.dir }}
  key: ${{ runner.os }}-composer-${{ steps.key-date.outputs.date }}-${{ hashFiles('composer.json') }}

.github/workflows/phar.yml

@@ -22,7 +22,7 @@ jobs:
  run: echo "::set-output name=dir::$(composer config cache-files-dir)"
 
  - name: Cache dependencies
- uses: actions/cache@v3
+ uses: actions/cache@v4
  with:
  path: ${{ steps.composer-cache.outputs.dir }}
  key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}