Change code owners for 6.2 to release managers

Author: ahoppen

CODEOWNERS

@@ -1,14 +1,2 @@
-#
-# This source file is part of the Swift.org open source project
-#
-# Copyright (c) 2024 Apple Inc. and the Swift project authors
-# Licensed under Apache License v2.0 with Runtime Library Exception
-#
-# See https://swift.org/LICENSE.txt for license information
-# See https://swift.org/CONTRIBUTORS.txt for Swift project authors
-#
-
-* @ahoppen @allevato @bnbarham @shawnhyam
-
-.github/ @ahoppen @bnbarham @shahmishal
-.swiftci/ @ahoppen @bnbarham @shahmishal
+# For the release branch @swiftlang/swift-branch-managers needs to approve the changes
+* @swiftlang/swift-branch-managers