update copilot to 24.7.0.alpha9 (#7282)

* update copilot to 24.7.0.alpha9

* update hilla to 24.7.0.alpha12 (#7281)

Author: vaadin-bot

versions.json

@@ -143,7 +143,7 @@
             "npmName": "@vaadin/grid"
         },
         "hilla": {
-            "javaVersion": "24.7.0.alpha11"
+            "javaVersion": "24.7.0.alpha12"
         },
         "horizontal-layout": {
             "jsVersion": "24.7.0-alpha8",
@@ -391,7 +391,7 @@
             "javaVersion": "1.1.0"
         },
         "copilot": {
-            "javaVersion": "24.7-SNAPSHOT"
+            "javaVersion": "24.7.0.alpha9"
         },
         "kubernetes-kit-starter": {
             "javaVersion": "2.4.1"