Update CODEOWNERS (#60)

Author: laxmanchekka

.github/CODEOWNERS

@@ -1,5 +1,7 @@
 # Each line is a file pattern followed by one or more owners.
+
 # global
-* @laxmanchekka @kotharironak @surajpuvvada @ravisingal
+* @hypertrace/data-platform-owners
+
 # GH action
-.github/ @aaron-steinfeld @jbahire @kotharironak @buchi-busireddy
+.github/ @hypertrace/ci-owners