docs: add ref to CoC and other things (#244)

* add ref to CoC and other things

Signed-off-by: Doug Davis <[email protected]>

Author: Doug Davis

README.md

@@ -153,5 +153,13 @@ We love contributions from the community! Please check the
 [Contributor's Guide](https://github.com/cloudevents/sdk-javascript/blob/master/CONTRIBUTING.md)
 for information on how to get involved.
 
-[v1spec]: https://github.com/cloudevents/spec/tree/v1.0
-[v103pec]: https://github.com/cloudevents/spec/tree/v0.3
+Each SDK may ave its own unique processes, tooling and guidelines, common
+governance related material can be found in the
+[CloudEvents `community`](https://github.com/cloudevents/spec/tree/master/community)
+directory. In particular, in there you will find information concerning
+how SDK projects are
+[managed](https://github.com/cloudevents/spec/blob/master/community/SDK-GOVERNANCE.md),
+[guidelines](https://github.com/cloudevents/spec/blob/master/community/SDK-maintainer-guidelines.md)
+for how PR reviews and approval, and our
+[Code of Conduct](https://github.com/cloudevents/spec/blob/master/community/GOVERNANCE.md#additional-information)
+information.