fix(docs): clarify guidelines for becoming a committer (#6364)

* docs: clarify guidelines for becoming a committer

* Update Contributing.md

Co-authored-by: Chris de Almeida <[email protected]>

---------

Co-authored-by: Chris de Almeida <[email protected]>

Author: bjohansebas

Contributing.md

@@ -75,7 +75,7 @@ if you have questions or need guidance.
 
 ## Becoming a Committer
 
-All contributors who land a non-trivial contribution should be on-boarded in a timely manner,
+All contributors who have landed significant and valuable contributions should be onboarded in a timely manner,
 and added as a committer, and be given write access to the repository.
 
 Committers are expected to follow this policy and continue to send pull requests, go through