fix fixer check in CI

Author: garak

.github/workflows/build.yaml

@@ -6,7 +6,7 @@ on:
 
 jobs:
     check:
-        runs-on: ubuntu-22.04
+        runs-on: ubuntu-24.04
         steps:
             - name: Checkout
               uses: actions/checkout@v4
@@ -15,15 +15,17 @@ jobs:
             - name: Validate composer.json
               run: composer validate --strict --no-check-lock
     cs-fixer:
-        runs-on: ubuntu-22.04
+        runs-on: ubuntu-24.04
         name: PHP-CS-Fixer
         steps:
             - name: Checkout
               uses: actions/checkout@v4
             - name: Fix CS
               uses: docker://oskarstark/php-cs-fixer-ga
+              with:
+                args: --diff --dry-run
     tests:
-        runs-on: ubuntu-22.04
+        runs-on: ubuntu-24.04
         strategy:
             fail-fast: false
             matrix: