The follwing mutation updates an email alert:

```graphql
mutation UpdateTestSuiteEmailAlert($testSuiteEmailAlertId: ObjectID!, $email: String, $alertTypes: [EmailAlertType!]) {
  updateTestSuiteEmailAlert(input: {
    testSuiteEmailAlertId: $testSuiteEmailAlertId,
    email: $email
    alertTypes: $alertTypes
  }) {
    testSuiteEmailAlert {
      id
      email
      alertTypes
    }
  }
}
```