Release v0.2.1

What's Changed

• [Chore] remove automated create release note action by @RektPunk in #11
• [Feature] Added the pseudo quantile Huber loss by @bbeomjin in #13
• [Chore] change docstring and README by @RektPunk in #14
• [Release] release v0.2.1 by @RektPunk in #15

New Contributors

• @chulhongsung made their first contribution in #5
• @bbeomjin made their first contribution in #13
  Full Changelog: v0.2.0...v0.2.1