perf(module: site): update homepage

[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
[x] 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 #397 into master will decrease coverage by 0.07%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #397      +/-   ##
==========================================
- Coverage   89.44%   89.36%   -0.08%     
==========================================
  Files         320      320              
  Lines        7093     7093              
  Branches      568      568              
==========================================
- Hits         6344     6339       -5     
- Misses        578      583       +5     
  Partials      171      171

Impacted Files	Coverage Δ
components/date-picker/date-picker.component.ts	79.62% <0%> (-1.16%)	⬇️

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