Makefile: fix 'lint' target
Makefile: fix 'lint' target

The "format" toxenv no longer exists, and seems like it has mostly migrated
to the "codestyle" env. Let's update the lint target to reflect that.

Signed-off-by: Tycho Andersen <6b523322678240882acbb4da5312a12d8cd0082d@tycho.pizza>

qtile/qtile,ramnes/qtile,ramnes/qtile,qtile/qtile