Fix formatting of stateless server example in README

Author: 5enxia

README.md

@@ -400,7 +400,7 @@ mcp = FastMCP("StatefulServer")
 # Stateless server (no session persistence)
 mcp = FastMCP("StatelessServer", stateless_http=True)
 
-# Stateless server (no session persistence, no sse stream with supported client) 
+# Stateless server (no session persistence, no sse stream with supported client)
 mcp = FastMCP("StatelessServer", stateless_http=True, json_response=True)
 
 # Run server with streamable_http transport