Updated code owners (#123)

.github/CODEOWNERS

@@ -5,15 +5,13 @@
 
 # These owners will be the default owners for everything in
 # the repo, unless a later match takes precedence.
-*       @kckst8 @raplemie
-
-rush.json                       @itwin/oss-admins
-.github/workflows/publish.yml   @itwin/oss-admins
+rush.json                       @aruniverse
+.github/workflows/publish.yml   @aruniverse
 
 # imodel-browser
-packages/modules/imodel-browser/ @raplemie
-common/changes/@itwin/imodel-browser-react/ @raplemie
-packages/apps/storybook/src/imodel-browser/ @raplemie
+packages/modules/imodel-browser/ @aruniverse
+common/changes/@itwin/imodel-browser-react/ @aruniverse
+packages/apps/storybook/src/imodel-browser/ @aruniverse
 
 # delete-imodel
 packages/modules/delete-imodel/ @veekeys