Update CODEOWNERS (#517)

.github/CODEOWNERS

diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index 37502e3..7632fbb 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -1,3 +1,3 @@
 # This codebase has shared ownership and responsibility.
 
-* @hashicorp/terraform-core @hashicorp/terraform-devex @hashicorp/tf-editor-experience-engineers
+* @hashicorp/terraform-core @hashicorp/terraform-core-plugins @hashicorp/tf-editor-experience-engineers