fix: resolve SKILL.md validation errors

skills/azure-eventgrid-java/SKILL.md

@@ -2,6 +2,8 @@
 name: azure-eventgrid-java
 description: "Build event-driven applications with Azure Event Grid SDK for Java. Use when publishing events, implementing pub/sub patterns, or integrating with Azure services via events."
 package: com.azure:azure-messaging-eventgrid
+risk: unknown
+source: community
 ---
 
 # Azure Event Grid SDK for Java
@@ -303,3 +305,6 @@ EVENT_GRID_ACCESS_KEY=<your-access-key>
 - "event-driven messaging"
 - "pub/sub Azure"
 - "webhook events"
+
+## When to Use
+This skill is applicable to execute the workflow or actions described in the overview.