Added Justin Uhr talk title ➕📝

Author: triplingual

_data/schedule.yml

@@ -84,7 +84,7 @@
   - presenter: Steve Meyer
     title: Does anyone want to get together and talk about vectors and matrices?
   - presenter: Justin Uhr
-    title: TBD
+    title: Lessons Learned Building LLM-Powered Apps
   - presenter: Eric Morgan
     title: Building a Library
   - presenter: Kate Deibel