Adds note about URL-encoding password when importing by URL

doc/user/project/import/repo_by_url.md

@@ -9,4 +9,7 @@ You can import your existing repositories by providing the Git URL:
 1. Click **Create project** to begin the import process
 1. Once complete, you will be redirected to your newly created project
 
+NOTE: **Note:**
+If your password has special characters, you will need to enter them URL encoded, please see the [GitLab issue](https://gitlab.com/gitlab-org/gitlab/issues/29952) for more information.
+
 ![Import project by repo URL](img/import_projects_from_repo_url.png)