fix(module: pagination): fix syntax error in NzPaginationItemComponent

[rorry121]

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?

[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

[zorro-bot]

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[codecov]

Codecov Report

Merging #6485 (d3bb20a) into master (85ea273) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           master    #6485    +/-   ##
========================================
  Coverage   89.82%   89.82%            
========================================
  Files         478      478            
  Lines       15314    15314            
  Branches     2475     2332   -143     
========================================
  Hits        13756    13756            
  Misses        940      940            
  Partials      618      618            

Impacted Files	Coverage Δ
components/pagination/pagination-item.component.ts	100.00% <ø> (ø)
components/tabs/tab-nav-bar.component.ts	82.39% <0.00%> (-0.71%)	⬇️
components/core/util/text-measure.ts	91.30% <0.00%> (+1.73%)	⬆️

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