Bump actions/cache from 3 to 4 (#8)

Author: dependabot[bot]

.github/workflows/security.yml

@@ -39,7 +39,7 @@ jobs:
               run: echo "::set-output name=dir::$(composer config cache-files-dir)"
 
             - name: Restore Composer Cache
-              uses: actions/cache@v3
+              uses: actions/cache@v4
               with:
                   path: ${{ steps.composer-cache.outputs.dir }}
                   key: ${{ runner.os }}-${{ matrix.php }}-composer-${{ hashFiles('**/composer.json') }}