Fix default url pattern.

src/Squidex/appsettings.json

@@ -30,7 +30,7 @@
       // Regex for slugs (e.g. hello-world).
       "Slug": "^[a-z0-9]+(\\-[a-z0-9]+)*$",
       // Regex for urls.
-      "Url": "^(?:http(s)?:\\/\\/)?[\\w.-]+(?:\\.[\\w\\.-]+)+[\\w\\-\\._~:/?#[\\]@!\\$&'\\(\\)\\*\\+,;=.]+$"
+      "Url": "^(?:http(s)?:\\/\\/)?[\\w.-]+(?:\\.[\\w\\.-]+)+[\\w\\-\\._~:\\/?#%[\\]@!\\$&'\\(\\)\\*\\+,;=.]+$"
     },
 
     "map": {