S3Bucket struct is missing `awsGeneratedTags` field.

[jeschkies]

The S3Bucket struct of the S3 event is missing the new awsGeneratedTags field:

aws-lambda-go/events/s3.go

Lines 49 to 53 in 87e344b

	type S3Bucket struct {
	Name string `json:"name"`
	OwnerIdentity S3UserIdentity `json:"ownerIdentity"`
	Arn string `json:"arn"` //nolint: staticcheck
	}

It seems it had been introduced recently https://docs.aws.amazon.com/AmazonS3/latest/userguide/notification-content-structure.html.