Update deoptimizer/OWNERS

Also change the component from Runtime to Compiler.

Change-Id: Ifb19e0d584b279b5f9bc6bc60531e64d4fecb4ad
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2218285
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68126}

src/deoptimizer/OWNERS

-bmeurer@chromium.org
-jarin@chromium.org
 sigurds@chromium.org
 tebbi@chromium.org
+neis@chromium.org
+nicohartmann@chromium.org
 
-# COMPONENT: Blink>JavaScript>Runtime
+# COMPONENT: Blink>JavaScript>Compiler