[computer_use_demo] using BETA_FLAG

[laiso]

I revised the code because the defined constant was not being used.

anthropic-quickstarts/computer-use-demo/computer_use_demo/loop.py

Lines 105 to 112 in a306792

	raw_response = client.beta.messages.with_raw_response.create(
	max_tokens=max_tokens,
	messages=messages,
	model=model,
	system=system,
	tools=tool_collection.to_params(),
	betas=["computer-use-2024-10-22"],
	)

[x5a]

@laiso thanks for your contribution