devel/py-botocore: Update to version 1.4.67.

Also set new maintainer (bradleythughes@fastmail.fm) and LICENSE_FILE.

PR: 213754
Submitted by: bradleythughes@fastmail.fm (new maintainer)
Approved by: AMDmi3 (mentor) alexey@renatasystems.org (former maintainer)
Differential Revision: https://reviews.freebsd.org/D8351