fix: Change timeout_ms in event hooks to Number to match the old async moderation config (#203)

Author: adityaalifn

src/main/java/io/getstream/chat/java/models/App.java

@@ -500,7 +500,7 @@ public static class EventHook {
 
     @Nullable
     @JsonProperty("timeout_ms")
-    private Integer timeoutMs;
+    private Number timeoutMs;
 
     @Nullable
     @JsonProperty("callback")