Add relevant link to account license types
The list of  `account_license_types` values can be very confusing, especially since most of them don't really match with the names of access levels mentioned in the UI.
I've added a link to the relevant MS Docs page.
@@ -37,6 +37,7 @@ The following attributes are exported:
## Relevant Links
- [Azure DevOps Service REST API 5.1 - User Entitlements - Add](https://docs.microsoft.com/en-us/rest/api/azure/devops/memberentitlementmanagement/user%20entitlements/add?view=azure-devops-rest-5.1)
+- [Programmatic mapping of access levels](https://docs.microsoft.com/en-us/azure/devops/organizations/security/access-levels?view=azure-devops#programmatic-mapping-of-access-levels)
## Import
