gitlab-ci: fix gpg key

gitlab-ci/runner.sls

@@ -10,7 +10,7 @@ gitlab-runner:
     - humanname: gitlab-runner
     - name: {{ gitlab_ci.apt_repo }}
     - file: /etc/apt/sources.list.d/runner_gitlab-runner.list
-    - key_url: https://packages.gitlab.com/runner/gitlab-runner/gpgkey
+    - key_url: https://packages.gitlab.com/gpg.key
   file.managed:
     - name: /etc/apt/preferences.d/pin-gitlab-runner.pref
     - contents: |