adjust unit test to return empty string #82940

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1 error and 3 warnings

Error: Missing message content, please input a valid payload or message to send. No Message has been send.

No files were found with the provided path: qa-standards-dashboard-data/coverage. No artifacts will be uploaded.

Unexpected input(s) 'attachments', valid inputs are ['channel_id', 'payload', 'aws-access-key-id', 'aws-secret-access-key']

Unexpected input(s) 'attachments', valid inputs are ['channel_id', 'payload', 'aws-access-key-id', 'aws-secret-access-key']