LibWeb: Port {HTML,UIEvents,XHR}::EventNames to new String

Author: https://github.com/kennethmyhra
Commit: 4d87072201
Pull-request: https://github.com/SerenityOS/serenity/pull/17825
Reviewed-by: https://github.com/linusg ✅
Reviewed-by: https://github.com/trflynn89

Userland/Libraries/LibWeb/HTML/HTMLElement.cpp

@@ -319,7 +319,7 @@ void HTMLElement::click()
     m_click_in_progress = true;
 
     // FIXME: 4. Fire a synthetic pointer event named click at this element, with the not trusted flag set.
-    fire_a_synthetic_pointer_event(HTML::EventNames::click, *this, true);
+    fire_a_synthetic_pointer_event(HTML::EventNames::click.to_deprecated_fly_string(), *this, true);
 
     // 5. Unset this element's click in progress flag.
     m_click_in_progress = false;