add sonar section's subsection

[challenge-bot] / curriculum / challenge-bot.scm

diff --git a/curriculum/challenge-bot.scm b/curriculum/challenge-bot.scm
index 8ff5656859125c1dcfc0c7e78da92cfe7f263020..fb4b47bf1fd3c905be2dd76989dde0382eec0197 100644 (file)
--- a/curriculum/challenge-bot.scm
+++ b/curriculum/challenge-bot.scm
@@ -40,7 +40,9 @@
    (subsection
     :title [deck placement]))
   (section
-   :title [sonars]))
+   :title [sonars]
+   (subsection
+    :title [deck placement])))
  (chapter
   :title [wiring and software]
   (section