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: 11ce78ed62e79b6471c4980dba38a87680979032
+  sha: 23474119d8cc8df94a3e1308d6327b7c5407570b
   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 @@
-11ce78ed62e79b6471c4980dba38a87680979032
+23474119d8cc8df94a3e1308d6327b7c5407570b