Fix step name

[antonio-ramadas-dd]

Follow up to #1901 because I misspelled the name of the step. It's defined here:

datadog-api-client-python/.generator/conftest.py

Lines 541 to 543 in fe7a9a6

	@then(parsers.parse('the response "{response_path}" does not have field "{field}"'))
	def expect_response_does_not_have_field(context, response_path, field):
	"""Check that a response path does not have field."""

Review checklist

Please check relevant items below:

• This PR includes all newly recorded cassettes for any modified tests.

• This PR does not rely on API client schema changes.

  • The CI should be fully passing.

• Or, this PR relies on API schema changes and this is a Draft PR to include tests for that new functionality.

  • Note: CI shouldn't be run on this Draft PR, as its expected to fail without the corresponding schema changes.