Update 2-other-research-output.md

Author: NSLab-CUK

_pages/2-other-research-output.md

@@ -118,6 +118,8 @@ This page includes additional research outputs beyond conventional academic publ
 
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+* O-Joun Lee: Introduction to Graph Neural Networks. Van Lang University, Ho Chi Minh, Vietnam, 06/2026
+
 * O-Joun Lee: Toward Molecular Foundation Models: Pre-training GNNs for Effectiveness, Generalizability, and Interpretability. Van Lang University, Ho Chi Minh, Vietnam, 11/2025
   <details markdown="1">
     <summary>Photos</summary>