failed to unmarshal events.CloudWatchAlarmSNSPayload with more than one - in in alarm name

**Is your feature request related to a problem? Please describe.**
I have an alert in cloudwatch that send event into a sns topic and trigger a lambda

In some cases the following instruction raise parsing error

var snsAlarmMessage events.CloudWatchAlarmSNSPayload
err := json.Unmarshal([]byte(message), &snsAlarmMessage)

**i found there i a parsing problem when AlarmName is like "AlarmName": "Lag on Kafka consumer group \"test.test-test-test-test\" for topic \"test\"" with more than 1 -**

- \"test.test-test-test-test\" fails
- \"test.test-test\" is ok

full example message : { "AlarmName": ""AlarmName": "Lag on Kafka consumer group \"test.test-test-test-test\" for topic \"test\"", "AlarmDescription": "Usage of CPU by eks autoscaling group", "AWSAccountId": "746534058873", "NewStateValue": "ALARM", "NewStateReason": "Threshold Crossed: 2 datapoints [7.0 (24/03/21 14:10:00), 7.8 (24/03/21 14:05:00)] were greater than or equal to the threshold (1.0).", "StateChangeTime": "2021-03-24T14:11:57.306+0000", "Region": "EU (Milan)", "AlarmArn": "arn:aws:cloudwatch:eu-south-1:746534058873:alarm:eks-asg-cpu-utilization-eks-6ebb16e6-ca97-467b-52b1-62c05eb16cdd", "OldStateValue": "INSUFFICIENT_DATA", "Trigger": { "MetricName": "CPUUtilization", "Namespace": "AWS/EC2", "StatisticType": "Statistic", "Statistic": "AVERAGE", "Unit": null, "Dimensions": [{ "value": "eks-6ebb16e6-ca97-467b-52b1-62c05eb16cdd", "name": "AutoScalingGroupName" } ], "Period": 60, "EvaluationPeriods": 5, "ComparisonOperator": "GreaterThanOrEqualToThreshold", "Threshold": 1.0, "TreatMissingData": "- TreatMissingData: missing", "EvaluateLowSampleCountPercentile": "" }}`

**Describe the solution you'd like**
expect that unmarshal is able to convert my json

**Additional context**