[owners] Update OWNERs file to libpng

Change-Id: I1c36a7b39e240f24a264dfd2d862fffdbc3fc696
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/libpng/+/557962
Reviewed-by: David Reveman <reveman@google.com>
diff --git a/OWNERS b/OWNERS
index 63ebe8a..f84548a 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,3 +1,3 @@
-cfontas@google.com
 villarreald@google.com
+reveman@google.com
 guruji@google.com