fix(module:description): fix label colon not working

[yangjunhan]

close #6151

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: #6151

What is the new behavior?

[nzColon]="false" is now working.

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[zorro-bot]

This preview will be available after the AzureCI is passed.

[codecov]

Codecov Report

Merging #6155 (293212d) into master (13f2281) will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #6155      +/-   ##
==========================================
+ Coverage   89.81%   89.84%   +0.02%     
==========================================
  Files         468      468              
  Lines       14258    14258              
  Branches     2243     2243              
==========================================
+ Hits        12806    12810       +4     
+ Misses        896      892       -4     
  Partials      556      556              

Impacted Files	Coverage Δ
components/descriptions/descriptions.component.ts	100.00% <ø> (ø)
components/tabs/tab-nav-bar.component.ts	81.62% <0.00%> (-0.71%)	⬇️
components/core/util/text-measure.ts	91.30% <0.00%> (+1.73%)	⬆️
components/table/src/table-data.service.ts	84.61% <0.00%> (+6.15%)	⬆️

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