docs: fixed the typo (#9702)

Author: patel-vansh

user_guide_src/source/extending/events/006.php

@@ -2,7 +2,7 @@
 
 use CodeIgniter\Events\Events;
 
-Events::trigger('some_events', $foo, $bar, $baz);
+Events::trigger('some_event', $foo, $bar, $baz);
 
 Events::on('some_event', static function ($foo, $bar, $baz) {
     // ...