fixed links

README.org

@@ -10,12 +10,12 @@ Python]] is also available online.
 ** Contributing to this Repository
 
 To contribute a notebook, please
-1. [fork this project](/ibi/notebooks/-/forks/new),
+1. [[https://scm.cms.hu-berlin.de/ibi/notebooks/-/forks/new][fork this project]],
 2. add your notebook and
-3. [create a merge request](https://docs.gitlab.com/ee/user/project/merge_requests/creating_merge_requests.html#new-merge-request-from-a-fork).
+3. [[https://docs.gitlab.com/ee/user/project/merge_requests/creating_merge_requests.html#new-merge-request-from-a-fork][create a merge request]].
 
 If you did everything correctly, you should see your changes in the
-[[/ibi/notebooks/-/merge_requests][list of merge requests]]. After your request has been approved, your
+[[https://scm.cms.hu-berlin.de/ibi/notebooks/-/merge_requests][list of merge requests]]. After your request has been approved, your
 notebook will be available in this repository. *Thank you for
 contributing!*