Update shivammathur/setup-php action to v2.28.0

Author: renovate[bot]

.github/workflows/ci.yml

@@ -35,7 +35,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Setup PHP
-        uses: shivammathur/setup-php@2.24.0
+        uses: shivammathur/setup-php@2.28.0
         with:
           php-version: ${{ matrix.php }}
           coverage: xdebug