about: bump date

content/page/about.md

@@ -3,7 +3,7 @@ title: About the course
 subtitle: Introduction to recursive probabilistic learning
 comments: false
 date: 2021-04-01
-lastmod: 2021-05-06
+lastmod: 2021-10-08
 ---
 
 This course is a "hands-on" introduction to machine learning methods that "use data as it arrives".