chore: update QRCode (#143)

Author: Ricbet

gatsby-config.js

@@ -166,9 +166,9 @@ module.exports = {
     showDingTalkQRCode: true,
     showWeChatQRCode: true,
     weChatQRCode:
-      'https://img.alicdn.com/imgextra/i2/O1CN01gGv30m1FBgm52NCDh_!!6000000000449-2-tps-200-198.png',
+      'https://mdn.alipayobjects.com/huamei_1fkuc4/afts/img/A*p31pT4e29YYAAAAAAAAAAAAADhviAQ/original',
     dingTalkQRCode:
-      'https://img.alicdn.com/imgextra/i3/O1CN01aUGtnO1gMfu1JESuP_!!6000000004128-0-tps-200-239.jpg',
+      'https://mdn.alipayobjects.com/huamei_1fkuc4/afts/img/A*EMZYTIpdYJsAAAAAAAAAAAAADhviAQ/original',
     showSearch: true, // 是否展示搜索框
     showChinaMirror: false, // 是否展示国内镜像链接
     showLanguageSwitcher: true, // 用于定义是否展示语言切换