Bump lookalike flag expiration.

Change-Id: Id181aa4fe87701830b5e843bc693ef8eb4041b63
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1866552
Commit-Queue: Joe DeBlasio <jdeblasio@chromium.org>
Auto-Submit: Joe DeBlasio <jdeblasio@chromium.org>
Reviewed-by: Mustafa Emre Acer <meacer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#707543}

chrome/browser/flag-metadata.json

@@ -1424,8 +1424,8 @@
   },
   {
     "name": "enable-lookalike-url-navigation-suggestions",
-    "owners": [ "jdeblasio", "meacer" ],
-    "expiry_milestone": 78
+    "owners": [ "jdeblasio", "meacer", "livvielin" ],
+    "expiry_milestone": 81
   },
   {
     "name": "enable-mark-http-as",