fix(module:tooltip): fix tooltip.spec.ts

[OriginRing]

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
[ ] No

Other information

[zorro-bot]

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[codecov]

Codecov Report

Merging #7893 (1b6cf82) into master (ea9969d) will increase coverage by 71.56%.
The diff coverage is n/a.

❗ Current head 1b6cf82 differs from pull request most recent head c71747a. Consider uploading reports for the commit c71747a to get more accurate results

@@             Coverage Diff             @@
##           master    #7893       +/-   ##
===========================================
+ Coverage   20.24%   91.81%   +71.56%     
===========================================
  Files         506      506               
  Lines       17304    17304               
  Branches     2748     2748               
===========================================
+ Hits         3504    15887    +12383     
+ Misses      13775     1125    -12650     
- Partials       25      292      +267     

see 343 files with indirect coverage changes

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