msmtp: 1.8.8 -> 1.8.10 (#86027)

This update contains the full fix for the unfortunate and very annoying
msmtpq regression [0]. #YAY
This successfully reduces the amount of spam my setup generates :)
(Note: SCNR)

Relevant patches:
- https://github.com/marlam/msmtp-mirror/commit/c78f24347ec996c7a3830b48403bf3736afca071
- https://github.com/marlam/msmtp-mirror/commit/dfb39595a5cdf048db4dfc438333a2b8948c5296

[0]: https://marlam.de/msmtp/news/