follow pkgconf transition

[sorah]

Complete these commits for distributions with pkgconf transition:

https://salsa.debian.org/ruby-team/ruby/-/commit/0970024589fc7bc7e794482cefbf9e7a0947e78d
https://salsa.debian.org/ruby-team/ruby/-/commit/db7995a9c8b6e946eaf3b82c685a1a9e10b72504

dist	pkg-config	pkgconf
bionic	0.29.1-0ubuntu2	0.9.12-6
focal	0.29.1-0ubuntu4	1.6.3-5
jammy	0.29.2-0ubuntu3	1.8.0-1
bullseye	0.29.2-1	1.8.1-1
bookworm	...	1.8.1-1

---

Transition Status:

• Debian https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1020799
• Ubuntu https://bugs.launchpad.net/ubuntu/+source/pkgconf/+bug/1998095