enhancement: produce more useful names in build-matrix #343

Description

Opening as a quick write-up; I didn't dig deep yet, and may even be in the wrong repository 😂

Looking at the packaging repository; for example on this PR docker/packaging#577

workflow; https://github.com/docker/packaging/actions/runs/43001873392/job/130460054549?pr=577

The checks matrix produces builds like;

run / build (almalinux10) / build (almalinux10, 0, linux/amd64, ubuntu-26.04)
run / build (almalinux10) / build (almalinux10, 1, linux/arm64, ubuntu-26.04-arm)

Given that the other parameters already seem to produce a unique combination, I wondered where the 0 and 1 came from, as they're not very informative.

Some initial searching .. I suspect this may be the part to look at?

Can we remove the numeric index somehow from the name to produce a more logical name for the check (perhaps a custom name: attribute if the fields in the matrix are predictable and not expected to change?)