make `authorVerified` a bool value

src/invidious/jsonify/api_v1/video_json.cr

@@ -227,7 +227,7 @@ module Invidious::JSONify::APIv1
                 json.field "author", rv["author"]
                 json.field "authorUrl", "/channel/#{rv["ucid"]?}"
                 json.field "authorId", rv["ucid"]?
-                json.field "authorVerified", rv["author_verified"]
+                json.field "authorVerified", rv["author_verified"] == "true"
                 if rv["author_thumbnail"]?
                   json.field "authorThumbnails" do
                     json.array do