Update ext-matrix-tests.yml

Author: crazywhalecc

.github/workflows/ext-matrix-tests.yml

@@ -119,7 +119,7 @@ jobs:
           ./spc --version
 
       - id: cache-download
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: downloads
           key: php-${{ matrix.php-version }}-dependencies-for-tests