Add zhin@ to OWNERS files needed for SIMD reviews

Change-Id: I256c351bea62fede28f6cfaa0be149729abffbd9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2271132Reviewed-by: Bill Budge <bbudge@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68771}

src/compiler/OWNERS

@@ -18,5 +18,6 @@ per-file int64-lowering.*=ahaas@chromium.org
 
 per-file simd-scalar-lowering.*=bbudge@chromium.org
 per-file simd-scalar-lowering.*=gdeepti@chromium.org
+per-file simd-scalar-lowering.*=zhin@chromium.org
 
 # COMPONENT: Blink>JavaScript>Compiler

src/compiler/backend/OWNERS

 bbudge@chromium.org
 gdeepti@chromium.org
+zhin@chromium.org
 
 # Plus src/compiler owners.