[js] Add gsathya to OWNERS

To help with reviewing and porting intl.js

Bug: v8:5751
Change-Id: Ic8ad425e7ff14ed39ff28e907f9d1e83a3629398
Reviewed-on: https://chromium-review.googlesource.com/1132821
Commit-Queue: Yang Guo <yangguo@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54372}

src/js/OWNERS

@@ -3,6 +3,7 @@ set noparent
 adamk@chromium.org
 bmeurer@chromium.org
 cbruni@chromium.org
+gsathya@chromium.org
 ishell@chromium.org
 jgruber@chromium.org
 jkummerow@chromium.org