[Docs] Tweak the doc of Transport Support in the README.md

Follow-up to #33.

The order of appearance of Stdio and Streamable HTTP follows the specification:
https://modelcontextprotocol.io/specification/2025-06-18/basic/transports

Author: koic

README.md

@@ -122,8 +122,8 @@ Notifications follow the JSON-RPC 2.0 specification and use these method names:
 
 #### Transport Support
 
-- **HTTP Transport**: Notifications are sent as Server-Sent Events (SSE) to all connected sessions
 - **Stdio Transport**: Notifications are sent as JSON-RPC 2.0 messages to stdout
+- **StreamableHTTP Transport**: Notifications are sent as JSON-RPC 2.0 messages over HTTP with streaming (chunked transfer or SSE)
 
 #### Usage Example