GH Actions: update PHP ini configuration

Ensure that errors for PHP starting up are also displayed.

Author: jrfnl

.github/workflows/update-website.yml

@@ -58,7 +58,7 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: '8.4'
-          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
           coverage: none
 
       - name: Get a list of the last 50 PHP_CodeSniffer releases