Docs: Added webhook specific configuration tips (#12802)

### What problem does this PR solve?


### Type of change


- [x] Documentation Update

docs/guides/agent/agent_component_reference/message.md

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+---
+sidebar_position: 4
+slug: /message_component
+sidebar_custom_props: {
+  categoryIcon: LucideMessageSquareReply
+}
+---
+# Message component
+
+A component that sends out a static or dynamic message.
+
+---
+
+As the final component of the workflow, a Message component returns the workflow’s ultimate data output accompanied by predefined message content. The system selects one message at random if multiple messages are provided.
+
+## Configurations
+
+### Status
+
+The HTTP status code (`200` ~ `399`) to return when the entire workflow completes. Available *only* when you select **Final response** as **Execution mode** in the [Begin](./begin.md) component.
+
+### Messages
+
+The message to send out. Click `(x)` or type `/` to quickly insert variables.
+
+Click **+ Add message** to add message options. When multiple messages are supplied, the **Message** component randomly selects one to send.
+
+### Save to memory
+
+Save the conversation to specified memories. Expand the dropdown list to either select all available memories or specified memories:
+
+
+![](https://raw.githubusercontent.com/infiniflow/ragflow-docs/main/images/save_to_memory.png)