Correct link from relative to absolute

README.md

@@ -38,7 +38,7 @@ There is a separate README for the [subpackage marc\_tools](marc_tools/README.md
 available.
 
 For an example of how *marc\_tools/marc\_extractor* can be used,
-have a look at the Jupyter Notebook in [extract-bibliographic](labs-team/extract-bibliographic).
+have a look at the Jupyter Notebook in [extract-bibliographic](//labs.onb.ac.at/gitlab/labs-team/extract-bibliographic).
 
 ## Running the tests