chore: sync CODEOWNERS with main

Replaces individual owners with @celestiaorg/protocol team to match main.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: rootulp

.github/CODEOWNERS

@@ -1,10 +1,8 @@
-# CODEOWNERS: https://help.github.com/articles/about-codeowners/
+# CODEOWNERS: <https://help.github.com/articles/about-codeowners/>
 
-# Everything goes through the following "global owners" by default.
-# Unless a later match takes precedence, these three will be
-# requested for review when someone opens a PR.
-# Note that the last matching pattern takes precedence, so
-# global owners are only requested if there isn't a more specific
-# codeowner specified below. For this reason, the global codeowners
-# are often repeated in package-level definitions.
-*     @rach-id @evan-forbes @mcrakhman @ninabarbakadze
+# Everything goes through the protocol team by default. The team's review
+# assignment settings control how many reviewers are auto-assigned per PR.
+# See: https://github.com/orgs/celestiaorg/teams/protocol/edit/review_assignment
+
+# global owners
+* @celestiaorg/protocol