net/routinator: Update to 0.12.1

ChangeLog: https://www.nlnetlabs.nl/news/2023/Jan/04/routinator-0.12.1-released/

Minor bugfixes.

• Actually use the extra-tals-dir config file option.
• Allow private keys prefixed both with BEGIN PRIVATE KEY and BEGIN RSA PRIVATE KEY in the files referred to by http-tls-key and rtr-tls-key configuration options.
• On Unix, if chroot is requested but no working directory is explicitly provided, set the working directory to the chroot directory.
• Fixed the error messages printed when the http-tls-key or http-tls-cert options are required but missing. They now refer to HTTP and not, as previously, to RTR.

PR: 268906
Reported by: jaap@NLnetLabs.nl (maintainer)