Add another example for cognito-idp update-user-pool

[kdnakt]

Description of changes:

The aws cognito-idp update-user-pool command can reset certain attributes of a user pool, so I've added an example of how to avoid that.

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[tim-finnigan]

Thanks for creating this PR, I think we'll want to check in with someone from the Cognito team to review this.

Link to docs for reference: https://awscli.amazonaws.com/v2/documentation/api/latest/reference/cognito-idp/update-user-pool.html#examples

I wasn't sure what the "As mentioned earlier," wording you added was referring to, but I think it's this warning:

This behavior is also explained more in the Cognito Developer Guide: https://docs.aws.amazon.com/cognito/latest/developerguide/cognito-user-pool-updating.html#cognito-user-pool-updating-api-cli

[kdnakt]

Yes, the "As mentioned earlier," wording refers to the warning.

I thought my change clarifies the explanation in the developer guide.

[elysahall]

Hi @kdnakt,
Thank you for your example submission! Since you submitted this PR, the example file has gone through significant updates. Please review if these updates address the changes you were making, and if not, update your PR to resolve conflicts.

Thanks.

[kdnakt]

Okay I'll review the changes.