[COSE212] Update lec5

Author: jhnaldo

_data/course/cose212/2025_2.yml

@@ -43,11 +43,11 @@ parts:
     - index: 5
       date: 09/17
       title: Identifiers (2)
-      # pdf: slides/lec5.pdf
-      # handout: slides/lec5-handout.pdf
+      pdf: slides/lec5.pdf
+      handout: slides/lec5-handout.pdf
       homework:
         - name: ex02
-          # link: https://github.com/ku-plrg-classroom/docs/tree/main/cose212/vae
+          link: https://github.com/ku-plrg-classroom/docs/tree/main/cose212/vae
     - index: 6
       date: 09/22
       title: First-Order Functions