let's not forget our json commas

missing comma made invalid json, which made most of the important tasks
get skipped.

roles/gitlab-runner/templates/gitlab_runner.fact

@@ -1,6 +1,6 @@
 {
   "registration_token": "{{ ansible_local.gitlab_runner.registration_token }}",
   "runner_token": "{{ runner_token.content | from_json | json_query('token') }}",
-  "gitlab_domain": "{{ ansible_local.gitlab_runner.gitlab_domain }}"
+  "gitlab_domain": "{{ ansible_local.gitlab_runner.gitlab_domain }}",
   "executor": "{{ ansible_local.gitlab_runner.executor }}"
 }