docs/features: mark KHR_no_error as started

The OpenGL extension KHR_no_error is exposed since commit
d42d150ad26e29d9e894ba9f9e28f8134e2e5393 by Timothy Arceri. Therefore it
should be marked as "started" in the features.txt

Signed-off-by: Kai Wasserbäch <kai@dev.carbon-project.org>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
1 file changed