fix(comp:desc): header component does not take effect

[threedayAAAAA]

fix #1710

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines
• Tests for the changes have been added/updated or not needed
• Docs and demo have been added/updated or not needed

What is the current behavior?

Using the header slot header component does not take effect

What is the new behavior?

Using the header slot header component take effect

Other information

[idux-bot]

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[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (3692447) 92.31% compared to head (3d39bcd) 92.31%.

Files	Patch %	Lines
packages/components/desc/src/Desc.tsx	84.61%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1742      +/-   ##
==========================================
- Coverage   92.31%   92.31%   -0.01%     
==========================================
  Files         346      346              
  Lines       32786    32794       +8     
  Branches     3709     3710       +1     
==========================================
+ Hits        30268    30274       +6     
- Misses       2518     2520       +2     

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