fix(module:table): fix @for track function

[huajian123]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/NG-ZORRO/ng-zorro-antd/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?

[ ] 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
[ ] No

Other information

[zorro-bot]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.50%. Comparing base (6bb95c0) to head (bc9204a).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #8593   +/-   ##
=======================================
  Coverage   91.50%   91.50%           
=======================================
  Files         534      534           
  Lines       18425    18425           
  Branches     2905     2905           
=======================================
  Hits        16860    16860           
  Misses       1244     1244           
  Partials      321      321           

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[HyperLife1119]

LGTM. Because these elements may be repeated, they cannot be used as track keys.

[Laffery]

LGTM