google/resource_source_repos_repository: Export repository url (hashi…

…corp#943)

* google/resource_source_repos_repository: Export repository url

* website/docs/r/sourcerepo_repository: Update official documentation link

docs/r/sourcerepo_repository.html.markdown

@@ -9,7 +9,7 @@ description: |-
 # google\_sourcerepo\_repository
 
 For more information, see [the official
-documentation](https://cloud.google.com/compute/docs/source-repositories) and
+documentation](https://cloud.google.com/source-repositories/) and
 [API](https://cloud.google.com/source-repositories/docs/reference/rest/v1/projects.repos)
 
 ## Example Usage
@@ -35,6 +35,7 @@ The following arguments are supported:
 
 ## Attributes Reference
 
-The following attribute is exported:
+The following attributes are exported:
 
 * `size` - The size of the repository.
+* `url` - The url to clone the repository.