update project

Author: HujikawaJunpei

projects/2023pg_fujikawa.html

@@ -77,7 +77,7 @@ <h2>Materials</h2>
       [preprint]
       [CGF page]
       [<a href="https://github.com/InteractiveGraphicsLab/Fabricatable-90-Pop-up">GitHub</a>]
-      [<a href="../slides/2023_PG_Fujikawa">slides</a>]
+      [<a href="../slides/2023_PG_Fujikawa.pptx">slides</a>]
 <br>
       <pre>
       to appear