fix: should update placment className when change align

[afc163]

ant-design/ant-design#31717

[codecov]

Codecov Report

Merging #279 (0645a4d) into master (55ed22f) will increase coverage by 0.01%.
The diff coverage is 100.00%.

❗ Current head 0645a4d differs from pull request most recent head bbc078f. Consider uploading reports for the commit bbc078f to get more accurate results

@@            Coverage Diff             @@
##           master     #279      +/-   ##
==========================================
+ Coverage   89.88%   89.90%   +0.01%     
==========================================
  Files          11       11              
  Lines         534      535       +1     
  Branches      136      137       +1     
==========================================
+ Hits          480      481       +1     
  Misses         54       54              

Impacted Files	Coverage Δ
src/Popup/PopupInner.tsx	96.49% <100.00%> (+0.06%)	⬆️

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