Action type

Argoviz and others have a target

```json
"potentialAction": [
{
"@type": "Action",
"name": "Execute web application",
"target": {
"@type": "EntryPoint",
"urlTemplate": "https://mybinder.org/v2/gh/earthcube/NotebookTemplates.git/main?filepath=GeoCODEStemplates/ARGO/SA_01_Argo_Data_Exploration.ipynb%22",
"description": "Open software on the web",
"httpMethod": ["GET"]
}
}
],
```

Schema does not have a target property:

```json
"action_type": {
"type": "object",
"properties": {
"@type": {"const": "Action"},
"urlTemplate": {"type": "string"},
"description": {
"type": "string",
"default": "Open software on the web"
},
"httpMethod": {
"type": "array",
"items": [
{
"type": "string",
"default": "GET"
}
]
}
}
},
```