www-client/brave-bin: add 1.71.123, drop 1.71.121

[irort]

close #5564

[github-actions[bot]]

:x: pkgcheck checks failed

• pkgcheck 0.10.31
• the corresponding ::gentoo commit: https://github.com/gentoo-mirror/gentoo/commit/c5ad95798e4f1fb8685ac8fe16f80044b0c9ed5f

QA Results:

``` www-client/brave-bin NonsolvableDepsInDev: version 1.71.123: nonsolvable depset(rdepend) keyword(amd64) dev profile (default/linux/amd64/23.0/musl) (8 total): solutions: [ sys-libs/glibc ] ```

:mag: QA Keywords Explanation