Update ymfonycorp/security-checker-action to V3. Rel. symfonycorp/security-checker-action#6

Author: janbarasek

.github/dependabot.yml

@@ -30,7 +30,7 @@ jobs:
         composer install --no-interaction --prefer-dist
 
     - name: The PHP Security Checker
-      uses: symfonycorp/security-checker-action@v2
+      uses: symfonycorp/security-checker-action@v3
 
     - name: Check PHPStan rules
       run: composer phpstan