Merge pull request #6944 from codyhoag/typo

Fix typo in contributing docs

Author: k8s-ci-robot

sig-docs/CONTRIBUTING.md

@@ -18,7 +18,7 @@ Before opening a pull request, contributors must sign the [CNCF Contributor Lice
 
 Contributors should be familiar with the following:
 - [kubernetes/website repo](https://github.com/kubernetes/website)
-- [Reference docs repo](https://github.com/kubernetes-sigs/reference-docs))
+- [Reference docs repo](https://github.com/kubernetes-sigs/reference-docs)
 - [Hugo static site generator](https://gohugo.io/)
 - [Documentation content guide](https://kubernetes.io/docs/contribute/style/content-guide/)
   - [What's allowed](https://kubernetes.io/docs/contribute/style/content-guide/#what-s-allowed)
@@ -40,4 +40,4 @@ Anyone can review pull requests and the review process is outlined in the
 ## Questions about contributing
 Feel free to ask any questions in the [#sig-docs](https://kubernetes.slack.com/messages/sig-docs) 
 Slack channel or in a 
-[SIG Docs meeting](https://github.com/kubernetes/community/tree/master/sig-docs#meetings).
+[SIG Docs meeting](https://github.com/kubernetes/community/tree/master/sig-docs#meetings).