fix: Dofigen JSON Schema

[taorepoara]

Some fixes.

I also found a way to test the JSON Schema locally in VSCode before adding it to this project, but I don't know where to document that.

In the .vscode/settings.json:

{
	"json.schemas": [
		{
			"fileMatch": [
				"*.json"
			],
			"url": "./my-schema-path.schema.json"
		}
	],
	"yaml.schemas": {
		"./my-schema-path.schema.json": "*.yml"
	}
}

[github-actions]

Thanks for the PR!

This section of the codebase is owned by @madskristensen and @hyperupcall - if they write a comment saying "LGTM" then it will be merged.

[hyperupcall]

Thanks! The documentation doesn't yet have a section for testing schemas - I'll add that next time I'm editing CONTRIBUTING.md