Fix package jsons

[NullVoxPopuli]

Resolves:

npm notice
npm notice Publishing to https://registry.npmjs.org/ with tag alpha and default access
npm notice publish Signed provenance statement with source and build information from GitHub Actions
npm notice publish Provenance statement published to transparency log: https://search.sigstore.dev/?logIndex=170689842
npm error code E422
npm error 422 Unprocessable Entity - PUT https://registry.npmjs.org/@embroider%2fbroccoli-side-watch - Error verifying sigstore provenance bundle: Failed to validate repository information: package.json: "repository.url" is "", expected to match "https://github.com/embroider-build/embroider" from provenance

from: https://github.com/embroider-build/embroider/actions/runs/13290516592/job/37109900418