rust 1.98.1 incoming

[Thomas Klausner <wiz%netbsd.org@localhost>]

Hi!

I've run a bulk build of bulk-test-rust with wip/rust198 on NetBSD
11.99.8/x86_64, and there was no breakage, so I'll commit the update
to pkgsrc.

As always, this package has been prepared by he@, thank you very much!
 Thomas