fix(module: mobile site): correct component name in mobile site

[fisherspy]

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-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?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[x] 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]

Codecov Report

Merging #415 into master will decrease coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master    #415      +/-   ##
=========================================
- Coverage   85.76%   85.7%   -0.06%     
=========================================
  Files         321     321              
  Lines        7718    7718              
  Branches     1096    1096              
=========================================
- Hits         6619    6615       -4     
- Misses        662     668       +6     
+ Partials      437     435       -2

Impacted Files	Coverage Δ
components/picker/picker.service.ts	80% <0%> (-5%)	⬇️
components/picker/picker.component.ts	68.18% <0%> (-1.52%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 4ff06d9...ee2da21. Read the comment docs.