japanese/font-migu: Update to 1.0.20231123 and take maintainership

In this release, the version numbers for 1? and 2m are different.
Update MASTER_SITES, DISTFILES, WWW and pkg-descr.

Changelog (japanese):
https://itouhiro.github.io/mixfont-mplus-ipa/changelog.html

PR: 277658
Approved by: hrs (maintainer timeout > 3 months)
Approved by: osa (mentor)