Fix links

app.py

@@ -432,10 +432,23 @@ app = Vizro().build(dashboard)
 app.dash.layout.children.append(
     html.Div(
         [
-            dbc.NavLink("🌸 Created by Li Nguyen", href="https://github.com/huong-li-nguyen"),
-            dbc.NavLink("💻 Code", href=""),
             dbc.NavLink(
-                "💾 Data", href="https://dataverse.harvard.edu/dataset.xhtml?persistentId=doi:10.7910/DVN/YGLYDY"
+                "🌸 Created by Li Nguyen",
+                href="https://github.com/huong-li-nguyen",
+                external_link="True",
+                target="_blank",
+            ),
+            dbc.NavLink(
+                "💻 Code",
+                href="https://huggingface.co/spaces/li-nguyen/dash-summer-app-2024/tree/main",
+                external_link="True",
+                target="_blank",
+            ),
+            dbc.NavLink(
+                "💾 Data",
+                href="https://dataverse.harvard.edu/dataset.xhtml?persistentId=doi:10.7910/DVN/YGLYDY",
+                external_link="True",
+                target="_blank",
             ),
         ],
         className="anchor-container",