[
  {
    "category": "``Polly``",
    "description": "Remove `Content-Type` header from ``synthesize_speech`` URL presigning.",
    "type": "bugfix"
  },
  {
    "category": "``connect``",
    "description": "Documentation update for a new Initiation Method value in DescribeContact API",
    "type": "api-change"
  },
  {
    "category": "``iotwireless``",
    "description": "Add Multicast Group support in Network Analyzer Configuration.",
    "type": "api-change"
  },
  {
    "category": "``sagemaker``",
    "description": "Added ml.p4d and ml.inf1 as supported instance type families for SageMaker Notebook Instances.",
    "type": "api-change"
  }
]