v1.9.1.0 - 21042024

Build based on jellyfin-media-player commit - 21.04.2024

Plus additional patches:
-update Ninja to v12
-mpv build 20240421
-set "jurplel/install-qt-action@v4" back to "jurplel/install-qt-action@v3" (v4 doesn't exist)
-set "Qt 5.15.2" to "Qt 5.15.*" to get newest Qt 5.15 version

Workflow run
https://github.com/siedenburg2/jellyfin-media-player/actions/runs/8770492997