Fix missing double \ for discord.gg non-3rd party RegEx

Author: Latent-Logic

static/regexes.js

@@ -86,7 +86,7 @@ const regex_types = [
             if (settings.third_party.checked) {
                 return "(?:https?://)?(?:www.|ptb.|canary.)?(?:dsc\\.gg|invite\\.gg|discord\\.link|(?:discord\\.(?:gg|io|me|li|id))|disboard\\.org|discord(?:app)?\\.(?:com|gg)/(?:invite|servers))/[a-z0-9-_]+";
             } else {
-                return `(?:https?://)?(?:www.|ptb.|canary.)?(?:discord\.gg|discord(?:app)?\\.(?:com|gg)/(?:invite|servers))/[a-z0-9-_]+`;
+                return `(?:https?://)?(?:www.|ptb.|canary.)?(?:discord\\.gg|discord(?:app)?\\.(?:com|gg)/(?:invite|servers))/[a-z0-9-_]+`;
             };
         },
         setting_elements: {