fix(Tab): incorrect style

[pany-ang]

在开启 type="card" 后，如果对 tab 进行 disabled 处理，那么 disabled 之后的 tab 项样式和正常样式并无差异。检查代码发现是因为一行 css 未生效，具体可见 commit。

<van-tabs v-model:active="active" type="card">
  <van-tab title="标签 1">内容 1</van-tab>
  <van-tab title="标签 2" disabled>内容 2</van-tab>
  <van-tab title="标签 3">内容 3</van-tab>
</van-tabs>

之前：

现在：

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.69%. Comparing base (5cbb870) to head (5bdd359).

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #12885   +/-   ##
=======================================
  Coverage   89.69%   89.69%           
=======================================
  Files         257      257           
  Lines        6957     6957           
  Branches     1711     1711           
=======================================
  Hits         6240     6240           
+ Misses        382      381    -1     
- Partials      335      336    +1     

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[chenjiahan]

Thanks ❤️