- Update workflow name from "Rewrite kernel configs" to "Update image-info.json"
- Remove unused matrix outputs from job configuration
- Fix duplicate cd command in commit step
- Fix git add path to use correct data/image-info.json
- Correct commit message to describe actual change
- Rename job from build-matrix to update-image-info
Signed-off-by: Igor Pecovnik <igor@armbian.com>