Update CODEOWNERS

Replacing Marcel and Rosica with Charles and Ivo.
diff --git a/CODEOWNERS b/CODEOWNERS
index 1a40092..a9dcf6d 100644
--- a/CODEOWNERS
+++ b/CODEOWNERS
@@ -1 +1 @@
-* @hlopko @scentini @oquenchil
\ No newline at end of file
+* @oquenchil @c-mita @comius