Add import instructions to Cognito User Pool Client resource documentation
Add import instructions to Cognito User Pool Client resource documentation

Reasoning: the importing of Cognito User Pool Client was added a long time ago but the documentation lacks the instructions on how to do it.

Relevant Terraform version: v1.7.0 and up

No new resources
No code changes
kjmkznr/terraform-provider-aws,Ninir/terraform-provider-aws,terraform-providers/terraform-provider-aws,terraform-providers/terraform-provider-aws,terraform-providers/terraform-provider-aws,terraform-providers/terraform-provider-aws,kjmkznr/terraform-provider-aws,Ninir/terraform-provider-aws,kjmkznr/terraform-provider-aws,Ninir/terraform-provider-aws,Ninir/terraform-provider-aws,kjmkznr/terraform-provider-aws