Say what to enter for the ServiceNow instance

The install form's instance field only works with the subdomain, but its description didn't say so; entering the full https://<instance>.service-now.com/ URL makes every call fail with no redirects allowed.

Author: mraible

api-integrations/ServiceNow.json

@@ -443,7 +443,7 @@
       "url": "{instance}.service-now.com",
       "variables": {
         "instance": {
-          "description": "the \"instance\" variable is replaced with a dynamic value at execution time"
+          "description": "Your ServiceNow instance name, the part before .service-now.com (for example, dev12345). Don't include https:// or the domain."
         }
       }
     }