GH Actions: update PHP ini configuration

Ensure that errors for PHP starting up are also displayed.

Author: jrfnl

.github/workflows/publish-wiki.yml

@@ -49,7 +49,7 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: 'latest'
-          ini-values: error_reporting=-1, display_errors=On, log_errors_max_len=0
+          ini-values: error_reporting=-1, display_errors=On, display_startup_errors=On, log_errors_max_len=0
           tools: phpcs, phpcbf
           coverage: none