Update CONTRIBUTING.md

CONTRIBUTING.md

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-You can find the guidelines to contribute to the MLCommons CM project 
-at the [CM GitHub page](https://github.com/mlcommons/ck/blob/master/CONTRIBUTING.md).
+## Contributing
+
+The best way to contribute to the MLCommons is to get involved with one of our many project communities. You find more information about getting involved with MLCommons [here](https://mlcommons.org/en/get-involved/#getting-started). 
+
+Generally we encourage people to become a MLCommons member if they wish to contribute to MLCommons projects, but outside pull requests are very welcome too.
+
+To get started contributing code, you or your organization needs to sign the MLCommons CLA found at the [MLC policies page](https://mlcommons.org/en/policies/). Once you or your organization has signed the corporate CLA, please fill out this [CLA sign up form](https://forms.gle/Ew1KkBVpyeJDuRw67) form to get your specific GitHub handle authorized so that you can start contributing code under the proper license.
+
+MLCommons project work is tracked with issue trackers and pull requests. Modify the project in your own fork and issue a pull request once you want other developers to take a look at what you have done and discuss the proposed changes. Ensure that cla-bot and other checks pass for your Pull requests.