Merge pull request #10 from jack-berg/update-codeowners

Update codeowners to @open-telemetry/java-maintainers

Author: jack-berg

.github/CODEOWNERS

@@ -2,4 +2,4 @@
 # This file controls who is tagged for review for any given pull request.
 
  # For anything not explicitly taken by someone else:
-*  @anuraaga @bogdandrutu @jkwatson
+*  @open-telemetry/java-maintainers