Update week5 writeups (#33)

* Fixes typo

* Optimize and prepare add copywriter and promotion

* add theme config

* crypto:学以致用

* week5-wp-all

* Standard week 5 writeup

Co-authored-by: yixinBC <yixinbc@foxmail.com>
Co-authored-by: LC静一 <LCjingyi@users.noreply.github.com>

* update copywriter

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Co-authored-by: yixinBC <yixinbc@foxmail.com>
Co-authored-by: Nebu1ea <1504895347@qq.com>
Co-authored-by: LC静一 <LCjingyi@users.noreply.github.com>

Author: 4 people