LibWeb: Port node text content to UTF-16

Author: https://github.com/trflynn89
Commit: 5c561c1a53
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/5627
Reviewed-by: https://github.com/gmta ✅

Libraries/LibWeb/HTML/HTMLTitleElement.cpp

@@ -37,14 +37,14 @@ void HTMLTitleElement::children_changed(ChildrenChangedMetadata const* metadata)
 }
 
 // https://html.spec.whatwg.org/multipage/semantics.html#dom-title-text
-String HTMLTitleElement::text() const
+Utf16String HTMLTitleElement::text() const
 {
     // The text attribute's getter must return this title element's child text content.
     return child_text_content();
 }
 
 // https://html.spec.whatwg.org/multipage/semantics.html#dom-title-text
-void HTMLTitleElement::set_text(String const& value)
+void HTMLTitleElement::set_text(Utf16String const& value)
 {
     // The text attribute's setter must string replace all with the given value within this title element.
     string_replace_all(value);