AWS::EC2::SecurityGroup doesn't support ssm-secure to retrieve SecureString values from SSM.

### Name of the resource

AWS::EC2::SecurityGroup

### Resource name

_No response_

### Description

We would like to retrieve a ```SecureString``` SSM parameter value for the `VpcId` property within the [AWS::EC2::SecurityGroup](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-security-group.html#cfn-ec2-securitygroup-vpcid) but failed with SSM Secure reference is not supported in: [AWS::EC2::SecurityGroup/Properties/VpcId].

We are aware of this resource type is not supported for dynamic parameter patterns for secure strings from the [list](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/dynamic-references.html#template-parameters-dynamic-patterns-resources)

However, we would like you to add 'AWS::EC2::SecurityGroup' to the list so we can retrieve values from SSM as 'SecureString'.

### Other Details

_No response_

Start by reviewing the AWS::EC2::SecurityGroup VpcId documentation and the dynamic-reference supported-resource list linked in the issue. Confirm how ssm-secure references are handled for SecureString parameters; done means this resource is supported and the documented limitation is updated.

Written by the indexing model from the issue text.