[bugfix] Tabs：修复开启animated属性时导致的滚动问题

[cookfront]

Fixes #2222

Changes you made in this pull request:

• Tabs：修复开启animated属性时导致的滚动问题

[codecov-io]

Codecov Report

Merging #2238 into dev will increase coverage by 0.14%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##              dev    #2238      +/-   ##
==========================================
+ Coverage   87.18%   87.33%   +0.14%     
==========================================
  Files         100      100              
  Lines        1772     1768       -4     
  Branches      361      359       -2     
==========================================
- Hits         1545     1544       -1     
  Misses        177      177              
+ Partials       50       47       -3

Impacted Files	Coverage Δ
packages/tab/index.vue	92.85% <ø> (-0.48%)	⬇️
packages/tabs/index.vue	77.03% <100%> (+1.67%)	⬆️

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