media-plugins/waylyrics: add 0.3.15, drop 0.3.13

[liuyujielol]

close #5254

[github-actions[bot]]

:heavy_check_mark: pkgcheck checks passed

• pkgcheck 0.10.30
• the corresponding ::gentoo commit: https://github.com/gentoo-mirror/gentoo/commit/48dda6f89a12c93b2f4bd9edfbdc2af2762adde2