Update CONTRIBUTING.md

Co-authored-by: W. Trevor King <wking@tremily.us>

Author: dgoodwin

CONTRIBUTING.md

@@ -66,7 +66,8 @@ This allows the message to be easier to read on GitHub as well as in various Git
 
 This repository uses [CodeRabbit](https://coderabbit.ai) for automated code review.
 Review rules are defined in [`.coderabbit.yaml`](.coderabbit.yaml) and encode
-common patterns identified from past PR reviews. Please review these rules when
+Review rules are defined in [`.coderabbit.yaml`](.coderabbit.yaml) and encode
+expected patterns for new submissions.
 contributing to understand the standards enforced during automated review.
 
 [golang-style]: https://github.com/golang/go/wiki/CodeReviewComments