fix(form): use merge repacle assign

[chenshuai2144]

No description provided.

[github-actions]

🎊 PR Preview has been successfully built and deployed to https://pro-components-preview-pr-3011.surge.sh

[github-actions]

size-limit report

Path	Size
packages/card/dist/card.js	19.07 KB (0%)
packages/descriptions/dist/descriptions.js	20.72 KB (0%)
packages/field/dist/field.js	134.56 KB (0%)
packages/form/dist/form.js	73.79 KB (0%)
packages/layout/dist/layout.js	89.28 KB (0%)
packages/list/dist/list.js	142.53 KB (0%)
packages/provider/dist/provider.js	11.86 KB (0%)
packages/skeleton/dist/skeleton.js	5.23 KB (0%)
packages/table/dist/table.js	48.92 KB (0%)

[codecov]

Codecov Report

Merging #3011 (51c7482) into master (ac630f9) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #3011      +/-   ##
==========================================
+ Coverage   99.24%   99.26%   +0.01%     
==========================================
  Files         173      173              
  Lines        5315     5315              
  Branches     1905     1905              
==========================================
+ Hits         5275     5276       +1     
+ Misses         39       38       -1     
  Partials        1        1              

Impacted Files	Coverage Δ
packages/utils/src/conversionSubmitValue/index.ts	100.00% <100.00%> (ø)
...ackages/utils/src/transformKeySubmitValue/index.ts	100.00% <100.00%> (ø)
packages/utils/src/useEditableArray/index.tsx	100.00% <100.00%> (ø)
packages/form/src/layouts/ModalForm/index.tsx	100.00% <0.00%> (+1.42%)	⬆️

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