docs: config provider searchBar param name

[Layouwen]

修正文档的参数名, 文档显示为 icon, 实际参数 searchIcon

[github-actions]

[cloudflare-workers-and-pages]

Deploying ant-design-mobile with    Cloudflare Pages

Latest commit:	fecd2ed
Status:	✅  Deploy successful!
Preview URL:	https://5b5dce0b.ant-design-mobile.pages.dev
Branch Preview URL:	https://docs-config-provider-searchb.ant-design-mobile.pages.dev

View logs

[github-actions]

Size Change: 0 B

Total Size: 370 kB

ℹ️ View Unchanged

Filename	Size
./lib/bundle/antd-mobile.compatible.umd.js	198 kB
./lib/bundle/antd-mobile.umd.js	152 kB
./lib/bundle/css-vars-patch.css	1.63 kB
./lib/bundle/style.css	18.5 kB

_{compressed-size-action}

[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
./lib/bundle/antd-mobile.es.js	107.76 KB	2.2 s (0%)	315 ms (+33.84% 🔺)	2.5 s

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.72%. Comparing base (8407aae) to head (fecd2ed).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6798      +/-   ##
==========================================
+ Coverage   92.70%   92.72%   +0.01%     
==========================================
  Files         335      335              
  Lines        7198     7198              
  Branches     1803     1804       +1     
==========================================
+ Hits         6673     6674       +1     
+ Misses        517      489      -28     
- Partials        8       35      +27     

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