Apply suggestions from code review

Author: shaneutt

CHANGELOG.md

@@ -42,14 +42,10 @@ been added to the Experimental channel.
 It's been four years since this project began, and we would never have got here
 without the support of a dedicated and active community. The maintainers would like
 to thanks _everyone_ who's contributed to Gateway API, whether in the form of
-commits to the repo, discussion, ideas, or general support.
-
-We literally couldn't have got this far without you.
+commits to the repo, discussion, ideas, or general support. We literally couldn't have gotten this far without you.
 
 This project is nowhere near finished, as you can see from the large amount of
-features being added into Experimental.
-
-With such a big set of things still to do, contributors and contributions are
+features being added into the Experimental Channel. With such a big set of things still to do, contributors and contributions are
 more vital than ever. Please feel welcome to join our
 [community!](https://gateway-api.sigs.k8s.io/contributing/)!