Tiny agents section was missing an end tag, making both Py and JS instructions appear in sequence.

Author: timadair

units/en/unit1/mcp-clients.mdx

@@ -288,7 +288,7 @@ Now you can run the agent:
 ```bash
 tiny-agents run agent.json
 ```
-
+</hfoption>
 <hfoption id="javascript">
 
 First, install the tiny agents package with [npm](https://docs.npmjs.com/downloading-and-installing-node-js-and-npm).