Very small update to fix black screens on some hardware.

Other:

• Change matrixProjection function stop use matrixFlip180 everywhere.
• Let openGL transpose the matrixes for us.
• Replace $(nproc) with $(shell nproc).
• Simplify matrix calculations
• Update wlroots

Special thanks

Special thanks as usual to these chads for donating:

• Neutronic
• Karagra
• Lipt0nas
• HauntedCoffeePot

Full Changelog: https://github.com/hyprwm/Hyprland/compare/v0.15.2beta...v0.15.3beta