Upgrade to Vaadin 24.9.4

See gh-1962

Signed-off-by: Zhe Sun <31067185+ZheSun88@users.noreply.github.com>

Author: ZheSun88

start-site/src/main/resources/application.yml

@@ -179,7 +179,7 @@ initializr:
           - compatibilityRange: "[3.4.0,3.5.0-M1)"
             version: 24.7.14
           - compatibilityRange: "[3.5.0-M1,4.0.0-M1)"
-            version: 24.9.3
+            version: 24.9.4
     platform:
       compatibilityRange: "3.4.0"
   dependencies: