Dunst as of 1.7.0 apparently no longer supports keyboard shortcuts (so
much for semantic versioning) in favor of having them be bound in the
window manager to invocations of `dunstctl`.
Change-Id: Ic3f10a29061c19ea0002e0f6d596baeafa58d968
Reviewed-on: https://cl.tvl.fyi/c/depot/+/3815
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI