fix go get link

release/install.sh

@@ -22,7 +22,7 @@ if [ -z "$GOPATH" ]; then
 fi
 
 go get -u v2ray.com/core/...
-go get -u v2ray/com/ext/...
+go get -u v2ray.com/ext/...
 rm $GOPATH/bin/vbuild
 go install v2ray.com/ext/tools/build/vbuild
 $GOPATH/bin/vbuild