[ignore] Update CODEOWNERS (DCNE-702)

Author: samiib

.github/CODEOWNERS

@@ -1,4 +1,4 @@
 # These owners will be the default owners for everything in the repo
 # and will be requested for review when someone opens a pull request.
 
-*       @akinross @anvitha-jain @gmicol @lhercot @sajagana @samiib @shrsr
+*       @akinross @anvitha-jain @gmicol @lhercot @mtarking @sajagana @samiib @shrsr