docs: update feature table — Python MCP Client transport

Mark Python MCP Client as supported (MCP SDK transport) following
tempoxyz/pympp#96 which adds the McpClient wrapper.

Author: brendanjryan

src/pages/sdk/features.mdx

@@ -49,7 +49,7 @@ Additional payment methods implement their own SDKs. Refer to the maintaining or
 
 | Role | TypeScript | Rust | Python |
 |---|---|---|---|
-| **Client** | MCP SDK transport | — | — |
+| **Client** | MCP SDK transport | — | MCP SDK transport |
 | **Server** | MCP SDK transport | — | FastMCP (`@pay` decorator) |
 
 ## Tempo features