docs(Badge): refine the description of 'props'

[pany-ang]

根据以下 Badge.tsx 的源码，完善文档对应 content 的描述：

    const renderContent = () => {
      const { dot, max, content } = props;

      if (!dot && hasContent()) {
        if (slots.content) {
          return slots.content();
        }

        if (isDef(max) && isNumeric(content!) && +content > +max) {
          return `${max}+`;
        }

        return content;
      }
    };

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.89%. Comparing base (0e5e8e5) to head (198a7a4).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #12936      +/-   ##
==========================================
+ Coverage   88.87%   88.89%   +0.01%     
==========================================
  Files         257      257              
  Lines        6977     6977              
  Branches     1718     1718              
==========================================
+ Hits         6201     6202       +1     
  Misses        435      435              
+ Partials      341      340       -1     

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[chenjiahan]

Thanks 👍🏻