Update 'content/topic/lessons-in-how-not-to-be-heard.md'

content/topic/lessons-in-how-not-to-be-heard.md

@@ -1,6 +1,7 @@
 ---
 title: "Lessons in how (not) to be heard"
 has_experiments: ["adversarial-music.md", "ad-versarials.md"]
+
 sessions:
   [
     "unsound-2020-session-2.md",