Update search.ts (#15593)

the query should be q=, not k=.

lib/routes/guangdiu/search.ts

@@ -9,7 +9,7 @@ const host = 'https://guangdiu.com';
 export const route: Route = {
     path: '/search/:query?',
     categories: ['shopping'],
-    example: '/guangdiu/search/k=百度网盘',
+    example: '/guangdiu/search/q=百度网盘',
     parameters: { query: '链接参数，对应网址问号后的内容' },
     features: {
         requireConfig: false,