LibWeb: Add a workaround for excessive memory usage in Page::load_html

Author: https://github.com/ADKaster
Commit: 29b12cb449
Pull-request: https://github.com/SerenityOS/serenity/pull/23910
Reviewed-by: https://github.com/awesomekling

Userland/Libraries/LibWeb/Page/Page.cpp

@@ -65,6 +65,8 @@ void Page::load(URL::URL const& url)
 
 void Page::load_html(StringView html)
 {
+    // FIXME: #23909 Figure out why GC threshold does not stay low when repeatedly loading html from the WebView
+    heap().collect_garbage();
 
     (void)top_level_traversable()->navigate({ .url = "about:srcdoc"sv,
         .source_document = *top_level_traversable()->active_document(),