chore: update owners (#499)

* chore: update owners

Signed-off-by: Grant Timmerman <744973+grant@users.noreply.github.com>

Author: grant

README.md

@@ -227,7 +227,6 @@ Currently active maintainers who may be found in the CNCF Slack.
 
 - Lance Ball (@lance)
 - Lucas Holmquist (@lholmquist)
-- Grant Timmerman (@grant)
 
 ## Contributing