docs(erlang): update docs/erlang.md (#676)

* feat(docs): add Erlang cheat sheet

Create an Erlang备忘清单 in markdown format to document common commands and
operations for Erlang programming, including入门, 代码结构, 常用内置函数 (BIFs),
并发编程, 错误处理, 分布式编程, OTP框架, 和测试.

This cheat sheet aims to provide a quick reference for Erlang developers and
learners, summarizing key points and examples for various aspects of the
language.

* docs(erlang): update links and clean up markdown formatting

- Update Erlang documentation links.

docs/erlang.md

@@ -447,4 +447,4 @@ erl -eval "eunit:test(module_name)" -s init stop
 ---
 
 - [Erlang 官方文档](https://www.erlang.org/docs)
-- [Erlang 编程书籍](https://www.erlang.org/books)
+- [Erlang 编程书籍](https://learnyousomeerlang.com/content)