Update README.md

Author: kraigher

README.md

@@ -4,6 +4,7 @@ This repository is a collection of HDL related tools.
 **NOTE**: These tools are at a usable state however they are still intensively developed and thus they are currently only recommended to be used by early adopters and people interested in contributing to the development.
 
 I am interested in [collaboration](#Collaboration) with other people especially regarding semantic analysis of VHDL.
+You can start contributing by reading the [Contributors Guide](https://github.com/kraigher/rust_hdl/wiki/Contributor-Guide)
 
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