LibURL/Pattern: URL parse correct value in opaque path canonicalization

Author: https://github.com/shannonbooth
Commit: e7ad9a9bad
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/3847
Reviewed-by: https://github.com/trflynn89

Libraries/LibURL/Pattern/Canonicalization.cpp

@@ -173,7 +173,7 @@ PatternErrorOr<String> canonicalize_a_pathname(String const& value)
 
     // 6. Let parseResult be the result of running basic URL parser given modified value with dummyURL
     //    as url and path start state as state override.
-    auto parse_result = Parser::basic_parse(value, {}, &dummy_url, Parser::State::PathStart);
+    auto parse_result = Parser::basic_parse(modified_value.string_view(), {}, &dummy_url, Parser::State::PathStart);
 
     // 7. If parseResult is failure, then throw a TypeError.
     if (!parse_result.has_value())