Added a reminder for draft participation grade

Lectures/L19_AssuranceCase/AssuranceCase.tex

@@ -61,6 +61,7 @@
 \frametitle{Administrative Details}
 
 \bi
+\item Draft participation grade
 \item When developing your code, remember that your goal is for someone else to be able to compile and run it
 \item Upcoming classes
 \bi