Update RTC's Type

[goetzrrGit]

I updated the immediate_load and immediate_activate types to be specific

ex.

immediate_load{
        "args": {
          "$ref": "#/$defs/args"
        },
        "description": {
          "$ref": "#/$defs/description"
        },
        "engine": {
          "type": "integer",
          "description": "Sequence target engine."
        },
        "type": {
          "const": "load" <------------------------ making this 'immediate_load'
        }
}

Also for consistency I added model attribute from immediateFSWCommands. I verified with Taifun, Carter, and Mike Schaffer of these changes and they were onboard with it.

[cohansen]

LGTM!

[cartermak]

LGTM other than version increment.