fix(h5): the value called by onThemeChange callback reversed

[Hitsuki9]

这个 PR 做了什么? (简要描述所做更改)

这个 PR 是什么类型? (至少选择一个)

• 错误修复(Bugfix) issue: fix #
• 新功能(Feature)
• 代码重构(Refactor)
• TypeScript 类型定义修改(Typings)
• 文档修改(Docs)
• 代码风格更新(Code style update)
• 其他，请描述(Other, please describe):

这个 PR 涉及以下平台:

• 所有小程序
• 微信小程序
• 支付宝小程序
• 百度小程序
• 字节跳动小程序
• QQ 轻应用
• 京东小程序
• 快应用平台（QuickApp）
• Web 平台（H5）
• 移动端（React-Native）
• 鸿蒙（harmony）

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 58.52%. Comparing base (1ab7de8) to head (b4d1049).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #17313   +/-   ##
=======================================
  Coverage   58.52%   58.52%           
=======================================
  Files         468      468           
  Lines       27136    27136           
  Branches     5921     5898   -23     
=======================================
  Hits        15882    15882           
- Misses       9780     9875   +95     
+ Partials     1474     1379   -95     

Flag	Coverage Δ
taro-cli	72.37% <ø> (ø)
taro-runtime	59.87% <ø> (ø)
taro-web	52.77% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
packages/taro-h5/src/api/base/weapp/app-event.ts	49.03% <ø> (ø)

... and 31 files with indirect coverage changes