问SAM部署正在更新API网关响应，但未部署到stage

EN

AWSTemplateFormatVersion: 2010-09-09
Transform:
  - AWS::Serverless-2016-10-31
  - AWS::CodeStar

Parameters:
  ProjectId:
    Type: String
    Description: CodeStar projectId used to associate new resources to team members
  CodeDeployRole:
    Type: String
    Description: IAM role to allow AWS CodeDeploy to manage deployment of AWS Lambda functions
  Stage:
    Type: String
    Description: The name for a project pipeline stage, such as Staging or Prod, for which resources are provisioned and deployed.
    Default: "Prod"

Resources:
  MyApi:
    Type: AWS::Serverless::Api
    Properties:
      StageName: !Sub "${Stage}"

  MissingAuthGatewayResponse:
    Type: AWS::ApiGateway::GatewayResponse
    Properties:
      ResponseTemplates:
        application/json: "{'message': 'Not found.'}"
      ResponseType: MISSING_AUTHENTICATION_TOKEN
      RestApiId: !Ref MyApi
      StatusCode: "403"

  HelloWorld:
    Type: AWS::Serverless::Function
    Properties:
      FunctionName: !Sub "awscodestar-${ProjectId}-lambda-HelloWorld"
      Handler: index.handler
      Runtime: python3.7
      Role:
        Fn::GetAtt:
          - LambdaExecutionRole
          - Arn
      Events:
        GetEvent:
          Type: Api
          Properties:
            RestApiId: !Ref MyApi
            Path: /
            Method: get

  LambdaExecutionRole:
    Description: Creating service role in IAM for AWS Lambda
    Type: AWS::IAM::Role
    Properties:
      RoleName: !Sub "CodeStar-${ProjectId}-Execution${Stage}"
      AssumeRolePolicyDocument:
        Statement:
          - Effect: Allow
            Principal:
              Service: [lambda.amazonaws.com]
            Action: sts:AssumeRole
      Path: /
      ManagedPolicyArns:
        - !Sub "arn:${AWS::Partition}:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole"
      PermissionsBoundary: !Sub "arn:${AWS::Partition}:iam::${AWS::AccountId}:policy/CodeStar_${ProjectId}_PermissionsBoundary"

Outputs:
  ApiURL:
    Description: "API URL"
    Value: !Sub "https://${MyApi}.execute-api.${AWS::Region}.amazonaws.com/${Stage}/"