update boilerplate file name: hello.py > main.py (modelcontextprotocol#196)

Author: bioerrorlog

quickstart/client.mdx

@@ -39,7 +39,7 @@ source .venv/bin/activate
 uv add mcp anthropic python-dotenv
 
 # Remove boilerplate files
-rm hello.py
+rm main.py
 
 # Create our main file
 touch client.py