Update actions/cache digest to 6682284 (#123)

Author: renovate[bot]

.github/workflows/php.yml

@@ -24,7 +24,7 @@ jobs:
 
     - name: Cache Composer packages
       id: composer-cache
-      uses: actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5
+      uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5
       with:
         path: vendor
         key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}