Update installation instructions for telemetry support (#853)

Author: brettcannon

python/README.md

@@ -7,9 +7,9 @@ Python SDK for programmatic control of GitHub Copilot CLI via JSON-RPC.
 ## Installation
 
 ```bash
-pip install -e ".[dev]"
+pip install -e ".[telemetry,dev]"
 # or
-uv pip install -e ".[dev]"
+uv pip install -e ".[telemetry,dev]"
 ```
 
 ## Run the Sample