LibWeb/URL: Make URL::search_params() return a NonnullGCPtr

Author: https://github.com/linusg
Commit: 0a556ae26d
Pull-request: https://github.com/SerenityOS/serenity/pull/18337
Reviewed-by: https://github.com/trflynn89

Userland/Libraries/LibWeb/URL/URL.cpp

@@ -400,7 +400,7 @@ WebIDL::ExceptionOr<void> URL::set_search(String const& search)
 }
 
 // https://url.spec.whatwg.org/#dom-url-searchparams
-URLSearchParams const* URL::search_params() const
+JS::NonnullGCPtr<URLSearchParams const> URL::search_params() const
 {
     // The searchParams getter steps are to return this’s query object.
     return m_query;