Link in README.md file corrected

Author: MartinOtter

README.md

@@ -3,7 +3,7 @@
 [![Stable](https://img.shields.io/badge/docs-stable-blue.svg)](https://modiasim.github.io/Modia.jl/stable)
 [![The MIT License](https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat-square)](https://github.com/ModiaSim/Modia.jl/blob/master/LICENSE)
 
-The [Modia Tutorial](https://modiasim.github.io/Modia.jl/stable) provides an introduction to Modia. Modia is part of [ModiaSim](https://modiasim.github.io/docs/).
+The [Modia Tutorial](https://modiasim.github.io/Modia.jl/tutorial/GettingStarted.html) provides an introduction to Modia. Modia is part of [ModiaSim](https://modiasim.github.io/docs/).
 
 Modia is a Julia package for modeling and simulation of multidomain engineering systems
 described by differential equations, algebraic equations, and (space-discretized) partial differential equations. It shares many powerful features of the [Modelica language](https://www.modelica.org/modelicalanguage), together with features not available in Modelica.