example: add access_level to gitlab_project_access_token

Author: MrLuje

examples/resources/gitlab_project_access_token/resource.tf

@@ -1,7 +1,8 @@
 resource "gitlab_project_access_token" "example" {
-  project    = "25"
-  name       = "Example project access token"
-  expires_at = "2020-03-14"
+  project      = "25"
+  name         = "Example project access token"
+  expires_at   = "2020-03-14"
+  access_level = "reporter"
 
   scopes = ["api"]
 }