refactor: update MenuItem title

[phyzess]

affects: @gio-design/components

Related issue link

#283

Changelog

Language	Changelog
🇺🇸 English	won't wrap children in MenuItem when there is no icon.
🇨🇳 Chinese	无 icon 的 MenuItem 不再添加 span 进行包裹 。

Self check

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• TypeScript definition is updated/provided or not needed
• Changelog is provided or not needed

[codecov]

Codecov Report

Merging #284 into master will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #284      +/-   ##
==========================================
+ Coverage   64.25%   64.27%   +0.01%     
==========================================
  Files         100      100              
  Lines        2907     2908       +1     
  Branches      738      739       +1     
==========================================
+ Hits         1868     1869       +1     
  Misses       1034     1034              
  Partials        5        5              

Impacted Files	Coverage Δ
...kages/components/src/components/menu/MenuTitle.tsx	100.00% <100.00%> (ø)

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[azure-pipelines]

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