Add bugs.url package metadata

[wangedmund77-cmyk]

Summary

• adds missing npm support/discovery metadata for unplugin-vue-components
• updates only package.json

Metadata added

• bugs.url: https://github.com/unplugin/unplugin-vue-components/issues

Validation

• parsed package.json as JSON after the change
• confirmed the changed manifest still has name: unplugin-vue-components
• checked this is metadata-only: no runtime code, dependencies, exports, generated assets, or build behavior changed

This small metadata fix makes the published npm package point users to the project README and/or public issue tracker once the package is next released.

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[userquin]

Lgtm thx ❤️