Bump enable-tls13-early-data expiration

Bug: 641225
Change-Id: Ifbe4f8c04e58ae4c9c6e9d357845740b735c2caf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2230906
Commit-Queue: David Benjamin <davidben@chromium.org>
Commit-Queue: Steven Valdez <svaldez@chromium.org>
Auto-Submit: David Benjamin <davidben@chromium.org>
Reviewed-by: Steven Valdez <svaldez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#775219}

chrome/browser/flag-metadata.json

@@ -2242,7 +2242,7 @@
   {
     "name": "enable-tls13-early-data",
     "owners": [ "svaldez" ],
-    "expiry_milestone": 83
+    "expiry_milestone": 90
   },
   {
     "name": "enable-touch-drag-drop",