fix: fix the "finish" event of statistic countdown

[hebingchang]

This is a ...

• New feature
• Bug fix
• Site / document update
• Component style update
• TypeScript definition update
• Refactoring
• Code style optimization
• Branch merge
• Other (about what?)

What's the background?

The @finish event in statistic countdown component doesn't work at all.

Self Check before Merge

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• TypeScript definition is updated/provided or not needed
• Changelog is provided or not needed

[netlify]

Deploy preview for ant-desing-vue processing.

Building with commit ad4f417

https://app.netlify.com/sites/ant-desing-vue/deploys/5e3c0daabf12960008456f2d

[codecov]

Codecov Report

Merging #1731 into master will increase coverage by 0.01%.
The diff coverage is 92%.

@@            Coverage Diff             @@
##           master    #1731      +/-   ##
==========================================
+ Coverage   88.04%   88.05%   +0.01%     
==========================================
  Files         157      157              
  Lines        5410     5417       +7     
  Branches     1524     1524              
==========================================
+ Hits         4763     4770       +7     
  Misses        578      578              
  Partials       69       69

Impacted Files	Coverage Δ
components/tag/Tag.jsx	91.66% <ø> (ø)	⬆️
components/time-picker/index.jsx	77.41% <ø> (ø)	⬆️
components/card/Grid.jsx	100% <ø> (ø)	⬆️
components/date-picker/wrapPicker.js	97.95% <ø> (ø)	⬆️
components/avatar/Avatar.jsx	96.15% <ø> (ø)	⬆️
components/rate/index.jsx	100% <ø> (ø)	⬆️
components/list/index.jsx	89.74% <ø> (ø)	⬆️
components/spin/Spin.jsx	92.15% <ø> (ø)	⬆️
components/switch/index.jsx	100% <ø> (ø)	⬆️
components/drawer/index.jsx	95.52% <ø> (ø)	⬆️
... and 61 more

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[github-actions]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.