Update CODEOWNERS (#13)

Author: Borda

.github/CODEOWNERS

@@ -2,7 +2,7 @@
 
 # These owners will be the default owners for everything in the repo. Unless a later match takes precedence,
 # @global-owner1 and @global-owner2 will be requested for review when someone opens a pull request.
-* @borda
+* @borda @ethanwharris @justusschock
 
 # CI/CD and configs
 /.github/       @borda