chore: ignore body rect

[zombieJ]

antd 站点有个 body 的 overflow: hidden 导致计算可见区域的时候被裁剪：
https://ant.design/~demos/components-select-demo-basic

[codecov]

Codecov Report

Merging #341 (315e31e) into master (5d63826) will decrease coverage by 0.15%.
The diff coverage is 50.00%.

❗ Current head 315e31e differs from pull request most recent head 8615e3a. Consider uploading reports for the commit 8615e3a to get more accurate results

@@            Coverage Diff             @@
##           master     #341      +/-   ##
==========================================
- Coverage   90.65%   90.51%   -0.15%     
==========================================
  Files          11       11              
  Lines         546      548       +2     
  Branches      166      161       -5     
==========================================
+ Hits          495      496       +1     
- Misses         51       52       +1     

Impacted Files	Coverage Δ
src/hooks/useAlign.ts	81.18% <50.00%> (-0.32%)	⬇️

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