add aaron to codeowners

CODEOWNERS

@@ -3,7 +3,7 @@
 # https://help.github.com/articles/about-codeowners/ and
 # https://github.com/blog/2392-introducing-code-owners
 #
-# Anybody can add themselves or a team as additional watcher or contributor 
+# Anybody can add themselves or a team as additional watcher or contributor
 # to get notified about changes in a specific package.
 # See https://help.github.com/articles/about-teams how to setup teams.
 
@@ -47,7 +47,7 @@ CMakeLists.txt    @szha @pllarroy
 
 # MXNet CI
 dev_menu.py         @pllarroy
-/ci/                @pllarroy @marcoabreu 
+/ci/                @pllarroy @marcoabreu @aaronmarkham
 /docker/            @marcoabreu
 /tests/ci_build/    @marcoabreu
 Jenkinsfile         @marcoabreu
@@ -59,7 +59,7 @@ Makefile          @szha
 prepare_mkl.sh    @szha
 
 # Docs
-/docs/            @szha @pllarroy
+/docs/            @szha @pllarroy @aaronmarkham
 
 # Submodules
 .gitmodules       @szha