Re-add syntax highlighting to daily emails and

...ATDC lessons

source/_daily_emails/2023-09-07.md

@@ -26,7 +26,7 @@ To start, we wrote a test for existing functionality within Drupal core - anonym
 
 This is the whole test:
 
-```php
+```language-php
 <?php
 
 namespace Drupal\Tests\my_module\Functional;