Documentation shouldn't say API URL

[jorgenpt]

The documentation says:

The “url” value should point to the Jira API url.

It should just say "To the JIRA root URL (e.g. https://my_company.onjira.com)" or something clearer. The API URL is something like /rest/api/VERSION/ or /rpc/soap/jirasoapservice-v2, which isn't the right thing to put there.