Update wlroots submodule
Forward up to 7723a09a226d812aa51d1439c2b5e8e21238d45c.
output-management-v1: send complete head state on enable change
Forward up to 7723a09a226d812aa51d1439c2b5e8e21238d45c.
output-management-v1: send complete head state on enable change