[Nearby] Add nohle@ to OWNERS

Change-Id: I5cbfd322da8b4e28b3b9e373e5530f833a462bef
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2284057
Commit-Queue: Josh Nohle <nohle@chromium.org>
Commit-Queue: James Vecore <vecore@google.com>
Auto-Submit: Josh Nohle <nohle@chromium.org>
Reviewed-by: James Vecore <vecore@google.com>
Cr-Commit-Position: refs/heads/master@{#785912}

chrome/browser/nearby_sharing/OWNERS

 alexchau@chromium.org
 hansberry@chromium.org
 knollr@chromium.org
+nohle@chromium.org
 vecore@google.com
 
 # COMPONENT: OS>Systems>Multidevice>Nearby