Fix first Python demo so it works

You can't do async with ... outside of an async def function

README.md

@@ -76,6 +76,11 @@ Connections between clients and servers are established through transports like
 MCP servers follow a decorator approach to register handlers for MCP primitives like resources, prompts, and tools. The goal is to provide a simple interface for exposing capabilities to LLM clients.
 
 ```python
+# /// script
+# dependencies = [
+#   "mcp"
+# ]
+# ///
 from mcp.server import Server, NotificationOptions
 from mcp.server.models import InitializationOptions
 import mcp.server.stdio
@@ -122,6 +127,7 @@ async def handle_get_prompt(
         ]
     )
 
+async def run():
     # Run the server as STDIO
     async with mcp.server.stdio.stdio_server() as (read_stream, write_stream):
         await server.run(
@@ -136,6 +142,10 @@ async with mcp.server.stdio.stdio_server() as (read_stream, write_stream):
                 )
             )
         )
+
+if __name__ == "__main__":
+    import asyncio
+    asyncio.run(run())
 ```
 
 ### Creating a Client