chore(deps): update actions/cache action to v4 (#703)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/build.yml

@@ -40,7 +40,7 @@ jobs:
         run: echo "::set-output name=dir::$(composer config cache-files-dir)"
 
       - name: Cache dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ${{ steps.composercache.outputs.dir }}
           key: ${{ runner.os }}-composer-${{ hashFiles('composer.json') }}
@@ -158,7 +158,7 @@ jobs:
           key: ${{ env.php-extensions-key }}
 
       - name: Cache PHP extensions
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ${{ steps.php-extensions-cache.outputs.dir }}
           key: ${{ steps.php-extensions-cache.outputs.key }}
@@ -177,7 +177,7 @@ jobs:
         run: echo "::set-output name=dir::$(composer config cache-files-dir)"
 
       - name: Cache dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ${{ steps.composercache.outputs.dir }}
           key: ${{ runner.os }}-composer-${{ hashFiles('composer.json') }}