Upgrade to Vaadin 24.4.12

See gh-1583

Author: ZheSun88

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

@@ -158,7 +158,7 @@ initializr:
         versionProperty: vaadin.version
         mappings:
           - compatibilityRange: "[3.2.0,3.4.0-M1)"
-            version: 24.4.11
+            version: 24.4.12
     gradle:
       dependency-management-plugin-version: 1.0.14.RELEASE
     platform: