LibJS+LibWeb: Replace JS::Utf16String with AK::Utf16String

Author: https://github.com/trflynn89
Commit: a43cb15e81
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/5388
Reviewed-by: https://github.com/shannonbooth ✅

Libraries/LibJS/Runtime/Intl/Segments.h

@@ -24,7 +24,7 @@ public:
 
     Unicode::Segmenter& segments_segmenter() const { return *m_segments_segmenter; }
 
-    Utf16View segments_string() const { return m_segments_string.view(); }
+    Utf16String const& segments_string() const { return m_segments_string; }
 
 private:
     Segments(Realm&, Unicode::Segmenter const&, Utf16String);