DOC: fix url

src/doc/tutorials/edit_mode.rst

@@ -25,7 +25,7 @@ Edit Mode``. Unsurprisingly, clicking here terminates the edit mode.
    privileges. You can only create/edit/delete entities if your user
    is allowed to do that. User and group permissions can be configured
    in detail as explained in the `server documentation
-   <https://docs.indiscale.com/caosdb-server/Permissions.html>`_.
+   <https://docs.indiscale.com/caosdb-server/permissions.html>`_.
 
 When you have entered the edit mode, you'll see the edit mode toolbox
 appearing on the right hand side of your screen: