[
  {
    "category": "``servicediscovery``", 
    "description": "Bugfix: Improved input validation for RegisterInstance action, InstanceId field", 
    "type": "api-change"
  }, 
  {
    "category": "``kafka``", 
    "description": "IAM Access Control for Amazon MSK enables you to create clusters that use IAM to authenticate clients and to allow or deny Apache Kafka actions for those clients.", 
    "type": "api-change"
  }, 
  {
    "category": "``ssm``", 
    "description": "SSM feature release - ChangeCalendar integration with StateManager.", 
    "type": "api-change"
  }, 
  {
    "category": "``snowball``", 
    "description": "AWS Snow Family adds APIs for ordering and managing Snow jobs with long term pricing", 
    "type": "api-change"
  }
]