book: update nl

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

Author: ttaylorr

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: 6f016688ba96d0b10069ad10846c7f53b52a7e87
+  sha: 320f0794b30749b625189f128fd52c5dc26bf67a
 page_title: Git - Book
 url: "/book/nl/v2.html"
 aliases:

external/book/sync/book-nl.sha

@@ -1 +1 @@
-6f016688ba96d0b10069ad10846c7f53b52a7e87
+320f0794b30749b625189f128fd52c5dc26bf67a