Fix double slash in profileurl

Author: Evan Prodromou

js/apiclient.js

@@ -14,7 +14,7 @@ const clientID = "6ac53a07b581e30e47664cd9e8f3d0e4"
 const authroot = `https://meta.wikimedia.org/w/rest.php`
 const authorize = `${authroot}/oauth2/authorize`
 const token = `${authroot}/oauth2/access_token`
-const profileurl = `${authroot}//oauth2/resource/profile`
+const profileurl = `${authroot}/oauth2/resource/profile`
 
 // API root