When looking up package metadata from ecosyste.ms, the PURL type for GitHub Actions doesn't match what ecosyste.ms expects.

Current behavior:

• git-pkgs uses ecosystem name github-actions
• This generates PURLs like pkg:github-actions/actions%2Fcheckout
• ecosyste.ms returns empty results for this PURL type

Expected behavior:

• ecosyste.ms uses ecosystem name actions
• PURLs should be pkg:actions/actions%2Fcheckout
• This returns package metadata including licenses

Verification:

# This returns empty
curl "https://packages.ecosyste.ms/api/v1/packages/lookup?purl=pkg:github-actions/actions%2Fcheckout"
# []

# This returns data
curl "https://packages.ecosyste.ms/api/v1/registries/github%20actions/packages/actions/checkout"
# {"name":"actions/checkout","licenses":"mit",...}

Fix needed:
Add ecosystem mapping in the enrichment layer or purl package to convert github-actions to actions when querying ecosyste.ms.