fix(layout): 修复 collapsedShowTitle 样式错误问题

[ONLY-yours]

修复前

修复后

[github-actions]

🎊 PR Preview has been successfully built and deployed to https://pro-components-preview-pr-7098.surge.sh

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (4a3ffb6) 97.93% compared to head (9cb2497) 97.93%.

❗ Current head 9cb2497 differs from pull request most recent head 3cc09b3. Consider uploading reports for the commit 3cc09b3 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #7098   +/-   ##
=======================================
  Coverage   97.93%   97.93%           
=======================================
  Files         338      338           
  Lines       11049    11049           
  Branches     3991     3991           
=======================================
  Hits        10821    10821           
  Misses        185      185           
  Partials       43       43           

Impacted Files	Coverage Δ
...ages/layout/src/components/SiderMenu/style/menu.ts	100.00% <ø> (ø)

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