upgrade reqwest, gix, hostname, comrak

[syphar]

• https://github.com/seanmonstar/reqwest/releases/tag/v0.12.0
• https://hrzn.ee/kivikakk/comrak/src/commit/a75a85d0e4b9a999d8aa675ebe66dbfc17f34554/changelog.txt#L1
• https://github.com/svartalf/hostname/blob/master/CHANGELOG.md#040---2024-04-01