[doc] Clone tutorial module

README.md

@@ -67,7 +67,7 @@ git clone https://gitlab.dune-project.org/core/dune-localfunctions.git
 git clone https://gitlab.dune-project.org/core/dune-istl.git
 ```
 
-Besides the core modules we need some extension modules and this tutorial
+Besides the core modules we need some extension modules
 
 ```shell
 git clone https://gitlab.dune-project.org/staging/dune-typetree.git
@@ -75,6 +75,12 @@ git clone https://gitlab.dune-project.org/staging/dune-functions.git
 git clone https://gitlab.dune-project.org/staging/dune-uggrid.git
 ```
 
+Finally this tutorial module
+
+```shell
+git clone git@git.imp.fu-berlin.de:graeser/dune-fu-tutorial.git
+```
+
 
 ## Configuring and building Dune