i18n: wiki_about (#778)

packages/hydrooj/locales/zh.yaml

@@ -908,6 +908,7 @@ What's domain?: 什么是域？
 What's script?: 什么是脚本？
 What's this?: 这是什么？
 Whether to show tags in the problem list.: 是否在题目列表中显示题目的标签。
+wiki_about: 关于
 Will be used as the domain icon.: 将被用作系统图标。
 With this feature, you can copy problems that you can view from a domain to some other domain. Their title, content, tags and categories will be copied. However, their test data are not copied directly.: 您可以通过这个功能将某域下您能查看的题目复制到其它域中，题目的标题、描述、标签与分类将被复制过来。但是测试数据不会被直接复制。
 With this feature, you can import problems that you can view from a site to here. Their title, content, tags and categories will be imported. However, their test data are not copied directly.: 您可以通过这个功能将其他 OJ 的题目导入到本站。题目的标题、题面、标签和分类将会被直接导入，测试数据将会在后台自动导入。