The comment block told the reader to run "git verify-tag 3.1.5", which is
exactly the tag that fails: 3.1.5 was tagged by the GitHub release form as
a lightweight ref and carries no signature. Use 3.1.6 in the examples and
state the baseline, so the file that teaches verification does not hand out
a command that cannot work.
https://github.com/acmesh-official/acme.sh/issues/7273
