[zh] Add style guide for Chinese localization

Most of the contents are summarized from previous practices. This PR is
an attempt to document these practices as guidelines.

Author: tengqm

content/zh/docs/contribute/localization.md

@@ -455,7 +455,7 @@ Some language teams have their own language-specific style guide and glossary. F
 ### 特定语言的样式指南和词汇表
 
 一些语言团队有自己的特定语言样式指南和词汇表。
-例如，请参见[韩语本地化指南](/ko/docs/contribute/localization_ko/)。
+例如，请参见[中文本地化指南](/zh/docs/contribute/localization_zh/)。
 
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