Merge branch 'update-errortracking-118-docs' into 'master'

Update release error tracking is available in to 11.8

See merge request gitlab-org/gitlab-ce!24528

(cherry picked from commit c2faab8d)

27b3838b Update release error tracking is available in to 11.8

doc/user/project/operations/error_tracking.md

 # Error Tracking
 
-> [Introduced](https://gitlab.com/groups/gitlab-org/-/epics/169) in GitLab 11.7.
+> [Introduced](https://gitlab.com/groups/gitlab-org/-/epics/169) in GitLab 11.8.
 
 Error tracking allows developers to easily discover and view the errors that their application may be generating. By surfacing error information where the code is being developed, efficiency and awareness can be increased.