Upgrade to Vaadin 24.9.6

Signed-off-by: Zhe Sun <[email protected]>

See gh-2000

Author: ZheSun88

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

@@ -180,10 +180,8 @@ initializr:
         artifactId: vaadin-bom
         versionProperty: vaadin.version
         mappings:
-          - compatibilityRange: "[3.4.0,3.5.0-M1)"
-            version: 24.7.14
-          - compatibilityRange: "[3.5.0-M1,4.0.0-M1)"
-            version: 24.9.5
+          - compatibilityRange: "[3.4.0-M1,4.0.0-M1)"
+            version: 24.9.6
     platform:
       compatibilityRange: "3.4.0"
   dependencies: