Merge branch 'patch-41' into 'master'

Docs: Add link to API for GitHub imports

See merge request gitlab-org/gitlab-ce!24808

doc/api/README.md

@@ -54,6 +54,7 @@ The following API resources are available:
   - [Project clusters](project_clusters.md)
   - [Project-level variables](project_level_variables.md)
   - [Project import/export](project_import_export.md)
+  - [Project import from GitHub](import.md)
   - [Project members](members.md)
   - [Project milestones](milestones.md)
   - [Project snippets](project_snippets.md)