docs: update comments in travis config and sycn zh docs

packages/docs/docs/guide/deploy.md

@@ -82,7 +82,7 @@ deploy:
   provider: pages
   skip_cleanup: true
   local_dir: docs/.vuepress/dist
-  github_token: $GITHUB_TOKEN # a token generated on github allowing travis to push code on you repository
+  github_token: $GITHUB_TOKEN # A token generated on GitHub allowing Travis to push code on you repository. Set in the Travis settings page of your repository, as a secure variable
   keep_history: true
   on:
     branch: master

packages/docs/docs/zh/guide/deploy.md

@@ -78,10 +78,10 @@ script:
   - npm run docs:build
 deploy:
   provider: pages
-  skip-cleanup: true
+  skip_cleanup: true
   local_dir: docs/.vuepress/dist
-  github-token: $GITHUB_TOKEN # a token generated on github allowing travis to push code on you repository
-  keep-history: true
+  github_token: $GITHUB_TOKEN # 在 GitHub 中生成，用于允许 Travis 向你的仓库推送代码。在 Travis 的项目设置页面进行配置，设置为 secure variable
+  keep_history: true
   on:
     branch: master
 ```