Update README.md

Author: pszufe

README.md

@@ -9,7 +9,7 @@
 ## Documentation
 
 
-- [tutorial](https://nbviewer.jupyter.org/github/pszufe/SimpleHypergraphs.jl/blob/examples/examples/basics/Basics.ipynb) - for a quick start with the library see our Jupyter Notebook tutorial on main library functionality
+- [tutorial](https://nbviewer.jupyter.org/github/pszufe/SimpleHypergraphs.jl/blob/master/examples/basics/Basics.ipynb) - for a quick start with the library see our Jupyter Notebook tutorial on main library functionality
 - [**STABLE**][docs-stable-url] — **documentation of the most recently tagged version.**
 - [**DEV**][docs-dev-url] — **documentation of the development version.**