Merge branch 'docs/fix-helm-chart-issue-link' into 'master'

Fix link for raising helm chart issues

See merge request gitlab-org/gitlab-ce!22970

doc/install/kubernetes/gitlab_runner_chart.md

 # GitLab Runner Helm Chart
 > **Note:**
-These charts have been tested on Google Kubernetes Engine and Azure Container Service. Other Kubernetes installations may work as well, if not please [open an issue](https://gitlab.com/charts/gitlab-runner/issues).
+These charts have been tested on Google Kubernetes Engine and Azure Container Service. Other Kubernetes installations may work as well, if not please [open an issue](https://gitlab.com/gitlab-org/gitlab-runner/issues).
 
 The `gitlab-runner` Helm chart deploys a GitLab Runner instance into your
 Kubernetes cluster.