GH Actions: update PHP ini configuration

Add `display_startup_errors=On` as per the current recommendation from PHPUnit.

Ref: sebastianbergmann/phpunit-documentation-english@b3b159c

Author: jrfnl

.github/workflows/continuous-integration.yml

@@ -72,7 +72,7 @@ jobs:
         with:
           coverage: "none"
           extensions: "intl, zip"
-          ini-values: "memory_limit=-1, phar.readonly=0, error_reporting=E_ALL, display_errors=On"
+          ini-values: "memory_limit=-1, phar.readonly=0, error_reporting=E_ALL, display_errors=On, display_startup_errors=On"
           php-version: "${{ matrix.php-version }}"
           tools: composer
 
@@ -143,7 +143,7 @@ jobs:
         with:
           coverage: "none"
           extensions: "intl, zip"
-          ini-values: "memory_limit=-1, phar.readonly=0, error_reporting=E_ALL, display_errors=On"
+          ini-values: "memory_limit=-1, phar.readonly=0, error_reporting=E_ALL, display_errors=On, display_startup_errors=On"
           php-version: "7.4"
           tools: composer
 

.github/workflows/php32bit.yml

@@ -28,7 +28,7 @@ jobs:
         with:
           coverage: "none"
           extensions: "intl, zip"
-          ini-values: "memory_limit=-1, phar.readonly=0, error_reporting=E_ALL, display_errors=On"
+          ini-values: "memory_limit=-1, phar.readonly=0, error_reporting=E_ALL, display_errors=On, display_startup_errors=On"
           php-version: "8.4"
           tools: composer