Update API properties for Cognito Forms Connector

[corpeningc]

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No swagger file changes - just api properties and readme

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• I attest that the connector doesn't exist on the Power Platform today. I've verified by checking the pull requests in GitHub and by searching for the connector on the platform or in the documentation.
• I attest that the connector works and I verified by deploying and testing all the operations.
• I attest that I have added detailed descriptions for all operations and parameters in the swagger file.
• I attest that I have added response schemas to my actions, unless the response schema is dynamic.
• I validated the swagger file, apiDefinition.swagger.json, by running paconn validate command.
• If this is a certified connector, I confirm that apiProperties.json has a valid brand color and doesn't use an invalid brand color, #007ee5 or #ffffff. If this is an independent publisher connector, I confirm that I am not submitting a connector icon.

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• I have named this PR after the pattern of "Connector Name (Independent Publisher)" ex: HubSpot Marketing (Independent Publisher)
• Within this PR markdown file, I have pasted screenshots that show: 3 unique operations (actions/triggers) working within a Flow. This can be in one flow or part of multiple flows. For each one of those flows, I have pasted in screenshots of the Flow succeeding.
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[corpeningc]

@vmanoharas Hey, do you mind reviewing this one as well please?