chore: update codeowners to use cloud native team

Now managed via the Community repo:
https://github.com/open-feature/community/blob/main/config/open-feature/cloud-native/workgroup.yaml

Signed-off-by: Michael Beemer <beeme1mr@users.noreply.github.com>

Author: beeme1mr

CODEOWNERS

@@ -1,3 +1,6 @@
 # These owners will be the default owners for everything in
 # the repo. Unless a later match takes precedence
-* @AlexsJones @beeme1mr @skyerus
+#
+# Managed by Peribolos: https://github.com/open-feature/community/blob/main/config/open-feature/cloud-native/workgroup.yaml
+#
+* @open-feature/cloud-native-maintainers