Merge branch 'eread/add-deprecation-notice-to-service-templates' into 'master'

Add deprecation notice to service templates

See merge request gitlab-org/gitlab!53334

doc/user/project/integrations/services_templates.md

@@ -6,6 +6,10 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 
 # Service templates
 
+WARNING:
+Service templates are [deprecated and scheduled to be removed](https://gitlab.com/gitlab-org/gitlab/-/issues/268032)
+in GitLab 14.0. Use [project integration management](#central-administration-of-project-integrations) instead.
+
 Using a service template, GitLab administrators can:
 
 - Provide default values for configuring integrations when creating new projects.