[AAA551] Update lec8

Author: jhnaldo

_data/course/aaa551/2026_1.yml

@@ -52,8 +52,8 @@ parts:
     - index: 8
       date: 03/31
       title: Trace Properties
-      # pdf: slides/lec8.pdf
-      # handout: slides/lec8-handout.pdf
+      pdf: slides/lec8.pdf
+      handout: slides/lec8-handout.pdf
     - index: 9
       date: 04/02
       title: Abstract Machines