sam.schema.json: VPCEndpointIds: CloudFormation construct not recognized

## Problem

## Steps to reproduce the issue

when specifying VPCEndpointIds: in a AWS::Serverless::Api resource I get a validation error:
`Property VPCEndpointIds is not allowed.yaml-schema: aws://sam.schema.json`

ApiGateway:
Type: AWS::Serverless::Api
DependsOn: ApiCWLRoleArn
Properties:
EndpointConfiguration:
Type: PRIVATE
VPCEndpointIds: # Property VPCEndpointIds is not allowed.yaml-schema: aws://sam.schema.json
- !Ref APIGWVPCEndpoint
Name: !Ref apiName
StageName: "Prod"
TracingEnabled: True
DefinitionBody:
'Fn::Transform':
Name: 'AWS::Include'
Parameters:
Location: './api.yml'

## Expected behavior

- validation error should not pop up

## System details (run the `AWS: About Toolkit` command)

Desktop (please complete the following information):
OS: MacOS 13.1 (Ventura)
Visual Studio Code Version: v1.75.1
AWS Toolkit Version: v1.63.0

Start by locating sam.schema.json and inspect the AWS::Serverless::Api EndpointConfiguration definition. Reproduce the validation error with the VPCEndpointIds example, then update the schema so this CloudFormation construct is accepted and verify the warning no longer appears.

Written by the indexing model from the issue text.