fix chapter labelling in pdf

fangohr · fangohr · commit b4a91d72311b · 2022-01-03T15:08:43.000+01:00
diff --git a/book/_toc.yml b/book/_toc.yml
@@ -1,8 +1,8 @@
-format: jb-article
+format: jb-book
 root: opening
 options:
   numbered: true
-sections:
+chapters:
 - file: 01-introduction
 - file: 02-powerful-calculator
 - file: 03-data-types-structures
