Fix broken SVN migration link [ci skip]

doc/README.md

@@ -7,7 +7,7 @@
 - [GitLab Basics](gitlab-basics/README.md) Find step by step how to start working on your commandline and on GitLab.
 - [Importing to GitLab](workflow/importing/README.md).
 - [Markdown](markdown/markdown.md) GitLab's advanced formatting system.
-- [Migrating from SVN](migration/README.md) Convert a SVN repository to Git and GitLab
+- [Migrating from SVN](workflow/importing/migrating_from_svn.md) Convert a SVN repository to Git and GitLab
 - [Permissions](permissions/permissions.md) Learn what each role in a project (guest/reporter/developer/master/owner) can do.
 - [Profile Settings](profile/README.md)
 - [Project Services](project_services/project_services.md) Integrate a project with external services, such as CI and chat.