Describe the issue

The summaries in docstrings for classes beginning with UserPoolIdentityProvider use the wrong article (a identity instead of an identity) and have social identity provider names improperly quoted.

Links

https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_cognito.UserPoolIdentityProviderAmazon.html
https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_cognito.UserPoolIdentityProviderApple.html
https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_cognito.UserPoolIdentityProviderFacebook.html
https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_cognito.UserPoolIdentityProviderGoogle.html
https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_cognito.UserPoolIdentityProviderOidc.html
https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_cognito.UserPoolIdentityProviderSaml.html