i18n(frontend): デッキの「カラムの設定」に翻訳を追加

[kakkokari-gtyih]

What

• 「カラムの設定」にあたっていなかった翻訳を追加
  （flexible を「幅を自動調整」に変更）
• 「カラムの設定」に補足説明を追加
  （「幅」設定に「幅を自動調整」が有効の場合、これが幅の最小値となりますという説明を追加）

Why

Fix #11738

Additional info (optional)

Checklist

• Read the contribution guide
• Test working in a local environment
• (If needed) Add story of storybook
• (If needed) Update CHANGELOG.md
• (If possible) Add tests

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (2db63d1) 78.68% compared to head (75b2837) 78.69%.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop   #11778   +/-   ##
========================================
  Coverage    78.68%   78.69%           
========================================
  Files          925      925           
  Lines        97670    97670           
  Branches      7750     7752    +2     
========================================
+ Hits         76852    76857    +5     
+ Misses       20818    20813    -5     

see 2 files with indirect coverage changes

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[syuilo]

🙏🏻