ci: Use correct artifact name for dogfooding (#742)

## Summary

Fixes release workflow failure caused by artifact name mismatch.

The `download-artifact` step in `action.yml` was looking for an artifact
named with the commit SHA (`${{ github.sha }}`), but `build.yml` uploads
the artifact as `craft-binary`.

## Changes

- Updated `action.yml` to download artifact by name `craft-binary`
instead of `${{ github.sha }}`

## Related

- Failed run:
https://github.com/getsentry/craft/actions/runs/21755074971

Author: BYK

action.yml

@@ -93,7 +93,7 @@ runs:
       if: github.repository == 'getsentry/craft'
       uses: actions/download-artifact@fa0a91b85d4f404e444e00e005971372dc801d16 # v4
       with:
-        name: ${{ github.sha }}
+        name: craft-binary
         path: /tmp/craft-artifact
 
     - name: Install Craft from artifact or release