fix: fix demo

Author: anlyyao

src/badge/_example/size.tsx

@@ -10,7 +10,7 @@ export default function SizeBadge() {
         <Avatar icon={<UserIcon />} size="large" badgeProps={{ count: 8, size: 'large', offset: [7, 7] }} />
       </div>
 
-      <div className="summary">Middle</div>
+      <div className="summary">Medium</div>
       <div className="block">
         <Avatar icon={<UserIcon />} badgeProps={{ count: 8, offset: [5, 5] }} />
       </div>