Fix(dropdown) transition shifts in cascade dropdown with anchor option

[doom-9-zz]

No description provided.

[vercel]

This pull request is being automatically deployed with Vercel (learn more).
To see the status of your deployment, click below or on the icon next to each commit.

🔍 Inspect: https://vercel.com/tusimple/naive-ui/68BDBUsL4AkAt3tzWr9ptBi6LVcC
✅ Preview: https://naive-ui-git-fork-doom-9-fixdropdown-transition-65848a-tusimple.vercel.app

[doom-9-zz]

close #1600

[codecov]

Codecov Report

Merging #1620 (8f219c7) into main (66f4e2d) will increase coverage by 0.00%.
The diff coverage is 75.00%.

@@           Coverage Diff           @@
##             main    #1620   +/-   ##
=======================================
  Coverage   64.47%   64.47%           
=======================================
  Files         885      885           
  Lines       17057    17064    +7     
  Branches     4023     4024    +1     
=======================================
+ Hits        10997    11002    +5     
- Misses       5312     5314    +2     
  Partials      748      748           

Impacted Files	Coverage Δ
src/dropdown/src/utils.ts	87.50% <71.42%> (-12.50%)	⬇️
src/dropdown/src/DropdownOption.tsx	81.18% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 66f4e2d...8f219c7. Read the comment docs.