chore: release packages 1.2.1

[SyMind]

Summary

Ref: https://github.com/web-infra-dev/rspack/releases/tag/v1.2.1

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[netlify]

✅ Deploy Preview for rspack ready!

Name	Link
🔨 Latest commit	487ecd1
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[codspeed-hq]

CodSpeed Performance Report

Merging #9090 will not alter performance

_{Comparing changeset-release/main (487ecd1) with main (06807ac)}

🎉 Hooray! codspeed-node just leveled up to 4.0.0!

A heads-up, this is a breaking change and it might affect your current performance baseline a bit. But here's the exciting part - it's packed with new, cool features and promises improved result stability 🥳!
Curious about what's new? Visit our releases page to delve into all the awesome details about this new version.

Summary

✅ 3 untouched benchmarks