flags: assign use-winrt-midi-api

Per email discussions, this will expire for now in M76.

Bug: None
Change-Id: Iaad798936c451a8e5dbf7f93ec2bf9bb9902d53f
Reviewed-on: https://chromium-review.googlesource.com/c/1479836
Auto-Submit: Elly Fong-Jones <ellyjones@chromium.org>
Commit-Queue: Takashi Toyoshima <toyoshim@chromium.org>
Reviewed-by: Takashi Toyoshima <toyoshim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#634545}

chrome/browser/flag-metadata.json

@@ -3109,7 +3109,7 @@
   },
   {
     "name": "use-winrt-midi-api",
-    // "owners": [ "your-team" ],
+    "owners": [ "toyoshim" ],
     "expiry_milestone": 76
   },
   {