Fix: tree component vertical alignment of text

[ilanus]

closes #11458

[ant-design-bot]

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[yesmeck]

Setting vertical-align to middle seems not a solution.

[codecov]

Codecov Report

Merging #11473 into master will increase coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #11473      +/-   ##
==========================================
+ Coverage   91.84%   91.89%   +0.04%     
==========================================
  Files         199      199              
  Lines        5030     5060      +30     
  Branches     1409     1415       +6     
==========================================
+ Hits         4620     4650      +30     
+ Misses        406      404       -2     
- Partials        4        6       +2

Impacted Files	Coverage Δ
components/time-picker/index.tsx	74.5% <0%> (ø)	⬆️
components/transfer/index.tsx	87.41% <0%> (ø)	⬆️
components/pagination/Pagination.tsx	100% <0%> (ø)	⬆️
components/select/index.tsx	100% <0%> (ø)	⬆️

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[zombieJ]

Thanks for your contribution. We've adjust css of this file.