AK: Percent encode URL fragments when parsed

This fixes URL fragments containing characters in the fragment encoding
set that were not being correctly percent encoded.

Tests/LibWeb/Text/input/URL/url.html

@@ -21,6 +21,7 @@
             'http://[1:0:1:0:1:0:1:0]',
             'http://[1:1:0:0:1:0:0:0]/',
             'unknown://serenityos.org:0',
+            'http://serenityos.org/cat?dog#meow"woof',
         ]) {
             printURL(url);
         }