Update API model

Author: AWS SDK for Go v2 automation user

codegen/sdk-codegen/aws-models/appsync.json

@@ -647,6 +647,12 @@
  "traits": {
  "smithy.api#enumValue": "ar-AE"
  }
+ },
+ "fi_FI": {
+ "target": "smithy.api#Unit",
+ "traits": {
+ "smithy.api#enumValue": "fi-FI"
+ }
  }
  }
  },
@@ -1108,7 +1114,7 @@
  "parameters": {
  "Region": {
  "builtIn": "AWS::Region",
- "required": false,
+ "required": true,
  "documentation": "The AWS region used to dispatch the request.",
  "type": "String"
  },