chore: update docs root link

README.md

@@ -3,7 +3,7 @@
 This is the source code repository for the DTT backend server.
 
 Documentation for this is done with GitLab Pages using MkDocs and is available here:  
-[https://transfer.hft-stuttgart.de/pages/dtt/][pages-link]
+[https://transfer.hft-stuttgart.de/pages/dtt/documentation][pages-link]
 
 If you don't want to open the Webpage or it is not available for whatever reason,
 the documentation root is found [here][docs-root]