message: link to contribution page
diff: @@ -6,6 +6,8 @@ sub-folder is for a different project of the Working Group and has its own code
  - [utility-emissions-channel](utility-emissions-channel/README.md): [Utility Emissions Channel](https://wiki.hyperledger.org/display/CASIG/Utility+Emissions+Channel)
  - [net-emissions-token-network](net-emissions-token-network/README.md): [Net Emissions Token Network](https://wiki.hyperledger.org/display/CASIG/Emissions+Tokens+Network)
  +Get involved! Please see [How to Contribute](https://wiki.hyperledger.org/display/CASIG/How+to+Contribute) to help us build this open source platform for climate action.
  +
  ## Git Notes
  Please sign off all your commits. This can be done with
  