book: update de

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

Author: dscho

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

@@ -8,9 +8,9 @@
   language_code: de
   front_page: true
   repository_url: https://github.com/progit/progit2-de
-  sha: '029aac1834b180c96eba69ebe50c3062ddf1fcd3'
-  ebook_pdf: https://github.com/progit/progit2-de/releases/download/2.1.303/progit.pdf
-  ebook_epub: https://github.com/progit/progit2-de/releases/download/2.1.303/progit.epub
+  sha: 07c6c2b4ed2c4839f86e668a71d6e0306f66aa07
+  ebook_pdf: https://github.com/progit/progit2-de/releases/download/2.1.304/progit.pdf
+  ebook_epub: https://github.com/progit/progit2-de/releases/download/2.1.304/progit.epub
 page_title: Git - Book
 url: "/book/de/v2.html"
 aliases:

external/book/sync/book-de.sha

@@ -1 +1 @@
-029aac1834b180c96eba69ebe50c3062ddf1fcd3
+07c6c2b4ed2c4839f86e668a71d6e0306f66aa07