[bugfix] Field: label slot not work

[chenjiahan]

No description provided.

[codecov-io]

Codecov Report

Merging #2872 into dev will increase coverage by 0.18%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##              dev    #2872      +/-   ##
==========================================
+ Coverage   88.92%   89.11%   +0.18%     
==========================================
  Files         107      107              
  Lines        2168     2168              
  Branches      180      180              
==========================================
+ Hits         1928     1932       +4     
+ Misses        205      201       -4     
  Partials       35       35

Impacted Files	Coverage Δ
packages/field/index.js	100% <100%> (+1.56%)	⬆️
packages/collapse-item/index.js	89.36% <0%> (+6.38%)	⬆️

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