update desc of checkThirdParty

Author: sumneko

package/nls-zh-cn.lua

@@ -46,6 +46,7 @@ return {
 * OpenResty
 * Cocos4.0
 * LÖVE
+* skynet
 * Jass
 ]],
     ['config.workspace.userThirdParty']          = '在这里添加私有的第三方库适配文件路径，请参考内置的[配置文件路径](https://github.com/sumneko/lua-language-server/tree/master/meta/3rd)',

package/nls.lua

@@ -47,6 +47,7 @@ Automatic detection and adaptation of third-party libraries, currently supported
 * OpenResty
 * Cocos4.0
 * LÖVE
+* skynet
 * Jass
 ]],
     ['config.completion.enable']                 = 'Enable completion.',