Feat: Upgrade git-review to 2.3.1

The previous version of git-review is incompatible with the latest
version of git due to renaming flags.

Error:

Errors running git rebase -p -i remotes/gerrit/master
fatal: --preserve-merges was replaced by --rebase-merges

This is fixed in 2.2.0, upgrade to 2.3.1 its more recent.

Ref: https://review.opendev.org/c/opendev/git-review/+/818219
Issue-ID: RELENG-4418
Change-Id: I6057f4a197aa6ae38598b51d3ed62b8b0948db67
Signed-off-by: Anil Belur <abelur@linuxfoundation.org>