Update index.yml

lives/index.yml

 banner: 
   mobile_url: 'https://codechina.csdn.net/codechina/operation-work/uploads/700cd15fa181e0582638135e4c1954b3/banner.jpg'
-  pc_url: 'https://codechina.csdn.net/codechina/operation-work/uploads/700cd15fa181e0582638135e4c1954b3/banner.jpg'
-  link: 'https://www.baidu.com/'
+  pc_url: 'https://ss2.bdstatic.com/70cFvnSh_Q1YnxGkpoWK1HF6hhy/it/u=1959833875,2271371593&fm=26&gp=0.jpg'
+  link: 'https://codechina.csdn.net/'
 # 日期时间戳标志
 current: '2020-11-14'
 # 描述 富文本