feat(bezier-tokens): update alpha color token values

[sungik-choi]

Self Checklist

• I wrote a PR title in English and added an appropriate label to the PR.
• I wrote the commit message in English and to follow the Conventional Commits specification.
• I added the changeset about the changes that needed to be released. (or didn't have to)
• I wrote or updated documentation related to the changes. (or didn't have to)
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Related Issue

Summary

TODO: 색상값 업데이트 마무리 된 이후 더블체크 & 업데이트

Details

Breaking change? (Yes/No)

References

[channeltalk]

https://desk.channel.io/#/channels/1/team_chats/groups/1237/677e0638e0ec40895556

[changeset-bot]

⚠️ No Changeset found

Latest commit: afabd7c

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[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.91%. Comparing base (09694b0) to head (afabd7c).

Additional details and impacted files

@@           Coverage Diff           @@
##            alpha    #2590   +/-   ##
=======================================
  Coverage   81.91%   81.91%           
=======================================
  Files         145      145           
  Lines        2897     2897           
  Branches      925      925           
=======================================
  Hits         2373     2373           
- Misses        494      520   +26     
+ Partials       30        4   -26     

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