Update phpstan.yml

Author: palpalani

.github/workflows/phpstan.yml

@@ -16,11 +16,11 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: '8.1'
+          php-version: '8.3'
           coverage: none
 
       - name: Install composer dependencies
         uses: ramsey/composer-install@v3
 
       - name: Run PHPStan
-        run: ./vendor/bin/phpstan --error-format=github
+        run: ./vendor/bin/phpstan --error-format=github