update phpstan.yml

Author: michalsn

.github/workflows/phpstan.yml

@@ -23,7 +23,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php-version: ['8.2', '8.3', '8.4']
+        php-version: ['8.2', '8.4']
 
     uses: codeigniter4/.github/.github/workflows/phpstan.yml@CI46
     with: