Fixes Wiki Verb (#2149)

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## About The Pull Request

If you can't read the title, this fix doesn't affect you

## Why It's Good For The Game

Wiki integration is a very good thing

## Changelog

:cl:
fix: The wiki verb now works again
/:cl:

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interface/interface.dm

@@ -6,7 +6,7 @@
 	var/wikiurl = CONFIG_GET(string/wikiurl)
 	if(wikiurl)
 		if(query)
-			var/output = wikiurl + "/index.php?title=Special%3ASearch&profile=default&search=" + query
+			var/output = "[wikiurl]?title=Special%3ASearch&profile=default&search=[query]"
 			src << link(output)
 		else if (query != null)
 			src << link(wikiurl)