dev/release.sh: Add --reviewer to set reviewers

dev/release.sh: Add --reviewer to set reviewers

Doing this is kind of contrary to how we normally do things, as this
constitutes a kind of pre-approval.  However, without this, the normal
review process will modify the reviewed commits, and render the
annotated release tag invalid, which forces the person doing the
release to re-tag manually.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/11630)