CycloneDX V1.6 - Components and services under Declarations.Targets should be unique

The uniqueness of components and services types are enforced everywhere, except under the Declarations.Targets type.

Currently it looks like this: https://github.com/CycloneDX/specification/blob/d2948509102647896eeedcddd76112b4d286acee/schema/bom-1.6.schema.json#L407-L432

I think it should include uniqueness like this?

```jsonc
{
"targets": {
"type": "object",
"title": "Targets",
"description": "The list of targets which claims are made against.",
"additionalProperties": false,
"properties": {
"organizations": {
"type": "array",
"title": "Organizations",
"description": "The list of organizations which claims are made against.",
"items": {"$ref": "#/definitions/organizationalEntity"}
},
"components": {
"type": "array",
"title": "Components",
"description": "The list of components which claims are made against.",
"items": {"$ref": "#/definitions/component"},
"uniqueItems": true // <----------------------------
},
"services": {
"type": "array",
"title": "Services",
"description": "The list of services which claims are made against.",
"items": {"$ref": "#/definitions/service"},
"uniqueItems": true // <----------------------------
}
}
},
}
```