ci: add tests for PHP 8.5

Author: Chris8934

.github/workflows/static.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: PHPStan
         uses: docker://oskarstark/phpstan-ga
@@ -26,7 +26,7 @@ jobs:
     name: PHP-CS-Fixer
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: PHP-CS-Fixer
         uses: docker://oskarstark/php-cs-fixer-ga
         with:
@@ -37,7 +37,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Psalm
         uses: docker://vimeo/psalm-github-actions