fix(comp:desc): use div to wrap header slot

[threedayAAAAA]

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?

head插槽不换行

What is the new behavior?

head插槽换行

Other information

[idux-bot]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (2ca124d) 92.31% compared to head (d279c73) 92.32%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1752   +/-   ##
=======================================
  Coverage   92.31%   92.32%           
=======================================
  Files         346      346           
  Lines       32794    32789    -5     
  Branches     3710     3710           
=======================================
- Hits        30274    30271    -3     
+ Misses       2520     2518    -2     

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