Bump actions/cache from 2.1.5 to 2.1.7

Bumps [actions/cache](https://github.com/actions/cache) from 2.1.5 to 2.1.7.
- [Release notes](https://github.com/actions/cache/releases)
- [Commits](actions/cache@v2.1.5...v2.1.7)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/build.yml

@@ -88,15 +88,15 @@ jobs:
 
  - name: Cache extensions 5.3 - 5.6
  if: matrix.php < '7.0'
- uses: actions/[email protected].5
+ uses: actions/[email protected].7
  with:
  path: ${{ steps.cache-env-php5.outputs.dir }}
  key: ${{ steps.cache-env-php5.outputs.key }}
  restore-keys: ${{ steps.cache-env-php5.outputs.key }}
 
  - name: Cache extensions 7.0 - 8.0
  if: matrix.php >= '7.0'
- uses: actions/[email protected].5
+ uses: actions/[email protected].7
  with:
  path: ${{ steps.cache-env-php7.outputs.dir }}
  key: ${{ steps.cache-env-php7.outputs.key }}
@@ -119,7 +119,7 @@ jobs:
  run: echo "COMPOSER_CACHE_DIR=~\AppData\Local\Composer" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
 
  - name: Cache dependencies installed with composer
- uses: actions/[email protected].5
+ uses: actions/[email protected].7
  with:
  path: ${{ env.COMPOSER_CACHE_DIR }}
  key: php${{ matrix.php }}-composer-${{ hashFiles('**/composer.json') }}