Suggested badge link should go to /pipelines

The suggested badge url in the pipelines settings page links to commits/BRANCH, but it would be more useful to link /pipelines instead.

-[![pipeline status](https://gitlab.com/user/project/badges/master/pipeline.svg)](https://gitlab.com/user/project/commits/master)
+[![pipeline status](https://gitlab.com/user/project/badges/master/pipeline.svg)](https://gitlab.com/user/project/pipelines)