Merge pull request #528 from trueagi-io/fix-link-contribution

Fix link to contribution guide

README.md

@@ -14,7 +14,7 @@ Please look at the [Python unit tests](./python/tests) to understand how one can
 More complex usage scenarios are located at [MeTTa examples repo](https://github.com/trueagi-io/metta-examples).
 A lot of different materials can be found on [OpenCog wiki server](https://wiki.opencog.org/w/Hyperon).
 
-If you want to contribute the project please see the [contribution guide](./CONTRIBUTING.md) first.
+If you want to contribute the project please see the [contribution guide](./docs/CONTRIBUTING.md) first.
 If you find troubles with the installation, see the [Troubleshooting](#troubleshooting) section below.
 
 # Prepare environment