BUG APIGatewayCustomAuthorizerResponse event context cant be interface

Hi Team,

APIGatewayCustomAuthorizerResponse has some thing called
Context map[string]interface{} `json:"context,omitempty"`

but atually it should be map[string]string only strings are accepted,
More documentation: https://docs.aws.amazon.com/apigateway/latest/developerguide/api-gateway-lambda-authorizer-output.html

so it will not create any confusion if we change this to string,
If not I tried to send some json model which throws errors

Even the example is wrong:
https://github.com/aws/aws-lambda-go/blob/main/events/README_ApiGatewayCustomAuthorizer.md,
we cant send boolean or numbers also