Merge branch 'docs/ssot_admin_area_third_party_offers' into 'master'

Edited `Third Party Offers` for SSOT guidelines

See merge request gitlab-org/gitlab-ce!29103

doc/user/admin_area/settings/third_party_offers.md

+---
+type: reference
+---
+
 # Third party offers
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/20379)
 > in [GitLab Core](https://about.gitlab.com/pricing/) 11.1
 
-Within GitLab, we inform users of available third-party offers they might find valuable in order to enhance the development of their projects.  
-An example is the Google Cloud Platform free credit for using [Google Kubernetes Engine](https://cloud.google.com/kubernetes-engine/).
+Within GitLab, we inform users of available third-party offers they might find valuable in order
+to enhance the development of their projects. An example is the Google Cloud Platform free credit
+for using [Google Kubernetes Engine](https://cloud.google.com/kubernetes-engine/).
+
+The display of third-party offers can be toggled in the **Admin Area > Settings** page.
+
+<!-- ## Troubleshooting
+
+Include any troubleshooting steps that you can foresee. If you know beforehand what issues
+one might have when setting this up, or when something is changed, or on upgrading, it's
+important to describe those, too. Think of things that may go wrong and include them here.
+This is important to minimize requests for support, and to avoid doc comments with
+questions that you know someone might ask.
 
-The display of third-party offers can be toggled in the Admin area on the Settings page.
+Each scenario can be a third-level heading, e.g. `### Getting error message X`.
+If you have none to add when creating a doc, leave this section in place
+but commented out to help encourage others to add to it in the future. -->