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: 95b57bae79b5d1d25595578165c963d0dd4d626a
+  sha: a6b2fbbd7cd2bf7a5994fcfc9860f651a42a1181
   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 @@
-95b57bae79b5d1d25595578165c963d0dd4d626a
+a6b2fbbd7cd2bf7a5994fcfc9860f651a42a1181