Revert "devel/ninja: Update to 1.12.1"

Ninja 1.12.1 is causing more dependency problems at least in www/qt6-webengine
that will require some non-trivial amount of time to investigate.

This reverts commit f1cd45a6680d7274e0e5b985393dab116a853ca8.

PR: 279164
Reported by: Robert Cina <transitive@gmail.com>