book: update nl

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

Author: dscho

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

@@ -8,7 +8,7 @@
   language_code: nl
   front_page: true
   repository_url: https://github.com/progit/progit2-nl
-  sha: 8207303ea02b96c7bbec0810867db259aec122e2
+  sha: c4baa8f95961353fc7aaa90cb0e16a764fc13371
   ebook_pdf: https://github.com/progit/progit2-nl/releases/download/2.1.117/progit.pdf
   ebook_epub: https://github.com/progit/progit2-nl/releases/download/2.1.117/progit.epub
 page_title: Git - Book

external/book/sync/book-nl.sha

@@ -1 +1 @@
-8207303ea02b96c7bbec0810867db259aec122e2
+c4baa8f95961353fc7aaa90cb0e16a764fc13371