Merge branch 'patch-28' into 'master'

Fix link to Merge Request Coach

See merge request gitlab-org/gitlab-ce!17633

PROCESS.md

@@ -53,7 +53,7 @@ Below we describe the contributing process to GitLab for two reasons:
 Several people from the [GitLab team][team] are helping community members to get
 their contributions accepted by meeting our [Definition of done][done].
 
-What you can expect from them is described at https://about.gitlab.com/jobs/merge-request-coach/.
+What you can expect from them is described at https://about.gitlab.com/roles/merge-request-coach/.
 
 ## Assigning issues