autocorrect: update the field trial testing config of AutocorrectByDefault experiment

This CL updates the config (version) name of the Autocorrect experiment in preparation for Beta rollout of Autocorrect experiment.

Change-Id: I9dba22383dd89062a6513ff7d81962ebf67b410e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4551580


Reviewed-by: Curtis McMullan <curtismcmullan@chromium.org>
Commit-Queue: Chuong Ho <hdchuong@google.com>
Cr-Commit-Position: refs/heads/main@{#1147547}