Add Ziyi Xu to lab website

_data/data.yml

@@ -715,6 +715,20 @@ people:
             since: 2024
             photo: "img/people/yongjae_chung.jpg"
             interests: "Systems security, machine learning"
+
+      - &ziyi_xu
+            name: "Ziyi Xu"
+            anchor: ziyi_xu
+            internal: true 
+            role: "Master's student"
+            since: 2025
+            photo: "img/people/ziyi_xu.jpg"
+            interests: "Software supply chain security, dependency risk analysis, and intelligent systems"
+
+
+
+
+
 
     people_cards:
       - type: "Faculty"
@@ -745,6 +759,7 @@ people:
           - *pinhan_zhao
           - *neil_naveen
           - *yongjae_chung
+          - *ziyi_xu
 
       - type: "Visiting Scholars"
         anchor: visitingscholars