host加入以下内容

#GitHub Start
140.82.114.4 github.com
140.82.113.4 gist.github.com
185.199.108.153 assets-cdn.github.com
199.232.96.133 raw.githubusercontent.com
199.232.96.133 gist.githubusercontent.com
199.232.96.133 cloud.githubusercontent.com
199.232.96.133 camo.githubusercontent.com
199.232.96.133 avatars.githubusercontent.com
199.232.96.133 avatars0.githubusercontent.com
199.232.96.133 avatars1.githubusercontent.com
199.232.96.133 avatars2.githubusercontent.com
199.232.96.133 avatars3.githubusercontent.com
199.232.96.133 avatars4.githubusercontent.com
199.232.96.133 avatars5.githubusercontent.com
199.232.96.133 avatars6.githubusercontent.com
199.232.96.133 avatars7.githubusercontent.com