fix(menu): collapsed follow sider

[ElderJames]

🤔 This is a ...

• New feature
• Bug fix
• Site / documentation update
• Demo update
• Component style update
• Bundle size optimization
• Performance optimization
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Other (about what?)

🔗 Related issue link

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	fix the menu can't collapse follow the sider
🇨🇳 Chinese	修复菜单不能跟随Sider侧边栏收起的问题

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

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

[codecov-io]

Codecov Report

Merging #1069 (65b357a) into master (caff4b5) will increase coverage by 0.00%.
The diff coverage is 0.00%.

@@          Coverage Diff           @@
##           master   #1069   +/-   ##
======================================
  Coverage    6.72%   6.73%           
======================================
  Files         436     436           
  Lines       23721   23710   -11     
======================================
  Hits         1596    1596           
+ Misses      22125   22114   -11     

Impacted Files	Coverage Δ
components/layout/Sider.razor.cs	0.00% <0.00%> (ø)
components/menu/Menu.razor.cs	0.00% <0.00%> (ø)

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