actions: fix composer package cache being useless

Author: dktapps

.github/workflows/ci.yml

@@ -19,11 +19,10 @@ jobs:
         php-version: ${{ matrix.php }}
 
     - name: Cache Composer packages
-      id: composer-cache
       uses: actions/cache@v2
       with:
-        path: "~/.composer/cache"
-        key: "php-${{ matrix.php }}-composer-${{ hashFiles('**/composer.json') }}"
+        path: "~/.cache/composer"
+        key: "php-${{ matrix.php }}-composer-${{ hashFiles('**/composer.json') }}-v2"
         restore-keys: "php-${{ matrix.php }}-composer-"
 
     - name: Install dependencies