Potential fix for code scanning alert no. 1: Workflow does not contain permissions

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: CrazyBoy49z

.github/workflows/phpstan.yml

@@ -1,11 +1,12 @@
 name: PHPStan
+permissions:
+  contents: read
 
 on:
   push:
     paths:
       - '**.php'
       - 'phpstan.neon.dist'
-
 jobs:
   phpstan:
     name: phpstan