Extend enable-text-fragment-anchor flag expiry

Extend --enable-text-fragment-anchor flag expiry to M83.

Bug: 919204
Change-Id: I0605d90747b9f891826ec1b8c7f5614990aa4454
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1946454
Commit-Queue: Nick Burris <nburris@chromium.org>
Commit-Queue: David Bokan <bokan@chromium.org>
Reviewed-by: David Bokan <bokan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#720717}

chrome/browser/flag-metadata.json

@@ -1928,7 +1928,7 @@
   {
     "name": "enable-text-fragment-anchor",
     "owners": [ "bokan", "input-dev" ],
-    "expiry_milestone": 80
+    "expiry_milestone": 83
   },
   {
     "name": "enable-tls13-early-data",