fix(module: carousel): fix when resize active slider error show

[nuonuoge]

PR Checklist

Please check if your PR fulfills the following requirements:

• [x] The commit message follows our guidelines: https://github.com/NG-ZORRO/ng-zorro-antd-mobile/blob/master/CONTRIBUTING.md#commit
• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Application (the showcase website) / infrastructure changes
[ ] Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[codecov[bot]]

Codecov Report

Merging #767 (612581f) into master (c83c72d) will increase coverage by 0.03%. The diff coverage is 75.00%.

@@            Coverage Diff             @@
##           master     #767      +/-   ##
==========================================
+ Coverage   87.00%   87.04%   +0.03%     
==========================================
  Files         164      164              
  Lines        6641     6644       +3     
  Branches     1107     1109       +2     
==========================================
+ Hits         5778     5783       +5     
+ Misses        421      420       -1     
+ Partials      442      441       -1     

Impacted Files	Coverage Δ
components/carousel/carousel.component.ts	70.70% <75.00%> (+0.97%)	:arrow_up:

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