book: update zh

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

Author: dscho

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

@@ -8,10 +8,10 @@
   language_code: zh
   front_page: true
   repository_url: https://github.com/progit/progit2-zh
-  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
+  sha: a1ce148315986b5121390ca2ac2d931cfb5a8826
+  ebook_pdf: https://github.com/progit/progit2-zh/releases/download/2.1.74/progit.pdf
+  ebook_epub: https://github.com/progit/progit2-zh/releases/download/2.1.74/progit.epub
+  ebook_mobi: https://github.com/progit/progit2-zh/releases/download/2.1.74/progit.mobi
 page_title: Git - Book
 url: "/book/zh/v2.html"
 aliases:

external/book/sync/book-zh.sha

@@ -1 +1 @@
-7c94a57a097b69e9997ed85b144ff48a28998d69
+a1ce148315986b5121390ca2ac2d931cfb5a8826