Merge pull request #2131 from w3c/simoneonofri-contributing

Update CONTRIBUTING.md for non-member IPR commitment

CONTRIBUTING.md

@@ -3,8 +3,12 @@
 Contributions to this repository are intended to become part of Recommendation-track documents 
 governed by the [W3C Patent Policy](http://www.w3.org/Consortium/Patent-Policy-20040205/) and
 [Document License](http://www.w3.org/Consortium/Legal/copyright-documents). To contribute, you must 
-either participate in the relevant W3C Working Group or make a non-member patent licensing
- commitment.
+either participate in the relevant W3C Working Group or make a [non-member patent licensing
+ commitment](https://www.w3.org/policies/process/#contributor-license).
+
+If you are a non-member but would like to contribute, simply open a Pull Request. 
+The IPR bot will flag any need for commitment; get in touch with the
+[Staff Contact](https://www.w3.org/groups/wg/webauthn/) to confirm it.
 
 If you are not the sole contributor to a contribution (pull request), please identify all 
 contributors in the pull request's body or in subsequent comments.