Update build-php-unix.yml

Author: crazywhalecc

.github/workflows/build-php-unix.yml

@@ -102,7 +102,7 @@ jobs:
         uses: actions/cache@v4
         with:
           path: downloads
-          key: pack-lib-dependencies-${{ matrix.combination }}-${{ matrix.php-version }}
+          key: pack-lib-dependencies-${{ matrix.combination }}-${{ matrix.php-version }}-${{ matrix.runner }}
 
       - name: "Install Dependencies"
         if: matrix.runner != 'ubuntu-20.04'