book: update zh

Updated via the `update-book.yml` GitHub workflow.

Author: dscho

external/book/content/book/zh/v2/Git-基础-查看提交历史.html

@@ -27,7 +27,7 @@ <h2 id="_viewing_history">查看提交历史</h2>
 完成这个任务最简单而又有效的工具是 <code>git log</code> 命令。</p>
 </div>
 <div class="paragraph">
-<p>我们使用一个非常简单的 ``simplegit'' 项目作为示例。
+<p>我们使用一个非常简单的 "simplegit" 项目作为示例。
 运行下面的命令获取该项目：</p>
 </div>
 <div class="listingblock">

external/book/content/book/zh/v2/_index.html

@@ -8,7 +8,7 @@
   language_code: zh
   front_page: true
   repository_url: https://github.com/progit/progit2-zh
-  sha: b0c43a48f7bcf5d31eac77b96b5812b736cb8b51
+  sha: 7c94a57a097b69e9997ed85b144ff48a28998d69
   ebook_pdf: https://github.com/progit/progit2-zh/releases/download/2.1.73/progit.pdf
   ebook_epub: https://github.com/progit/progit2-zh/releases/download/2.1.73/progit.epub
   ebook_mobi: https://github.com/progit/progit2-zh/releases/download/2.1.73/progit.mobi

external/book/sync/book-zh.sha

@@ -1 +1 @@
-b0c43a48f7bcf5d31eac77b96b5812b736cb8b51
+7c94a57a097b69e9997ed85b144ff48a28998d69