Update doc for importing existing GitHub projects to GitLab

doc/workflow/importing/import_projects_from_github.md

@@ -14,7 +14,7 @@ If you want to import from a GitHub Enterprise instance, you need to use GitLab
 
 ![Importer page](github_importer/importer.png)
 
-* To import a project, you can simple click "Add". The importer will import your repository and issues. Once the importer is done, a new GitLab project will be created with your imported data.
+* To import a project, you can simple click "Add". The importer will import your repository, issues, and pull requests. Once the importer is done, a new GitLab project will be created with your imported data.
 
 ### Note
-When you import your projects from GitHub, it is not possible to keep your labels and milestones. We are working on improving this in the near future.
+When you import your projects from GitHub, it is not possible to keep your labels, milestones, and cross-repository pull requests. We are working on improving this in the near future.