chore: use the reviews group for allowing reviews

Author: puiterwijk

.github/CODEOWNERS

@@ -1,8 +1 @@
-# This is a comment.
-# Each line is a file pattern followed by one or more owners.
-
-# These owners will be the default owners for everything in
-# the repo. Unless a later match takes precedence,
-# @global-owner1 and @global-owner2 will be requested for
-# review when someone opens a pull request.
-*       @npmccallum
+*       @enarx/reviews