chore(ci): use ini workaround for php 8.5 only

Author: W0rma

.github/workflows/main.yml

@@ -15,10 +15,18 @@ jobs:
       uses: actions/checkout@v6
 
     - name: Setup PHP
+      if: ${{ matrix.php != '8.5' }}
       uses: shivammathur/setup-php@v2
       with:
         php-version: ${{ matrix.php }}
         coverage: none
+
+    - name: Setup PHP with register_arg_argv
+      uses: shivammathur/setup-php@v2
+      if: ${{ matrix.php == '8.5' }}
+      with:
+        php-version: ${{ matrix.php }}
+        coverage: none
         # this ini directive seems to be off by default in PHP 8.5
         # see https://github.com/php/php-src/issues/20279
         # enable it because codeception relies on it.