Add missing `repository` prop to package.json (#48803)
This should fix the following error:
```
npm ERR! 422 Unprocessable Entity - PUT https://registry.npmjs.org/@next%2fswc-darwin-x64 - Failed to validate repository information: package.json: "repository.url" is "undefined", expected to match "git+https://github.com/vercel/next.js" from provenance
```
https://github.com/vercel/next.js/actions/runs/4787411938/jobs/8512829488#step:10:74
- Related to https://github.com/vercel/next.js/pull/48757
