Update CONTRIBUTING.md

Author: yaythomas

CONTRIBUTING.md

@@ -31,7 +31,7 @@ ops/ci-checks.sh
 ```
 
 This script also validates your commit messages against the [Conventional Commits](https://www.conventionalcommits.org/) format.
-If you have uncommitted changes, it will skip commit message validation with a warning - commit first, then re-run to validate.
+Commit all your changes before you run the check. If your working directory is dirty the script will skip commit message validation with a warning. 
 
 You can also run the commit message check independently:
 ```