Add missing Feature to changelog for API 1.16 and add method

[MichaelOv]

• Add "Get a connection endpoint of a cable via API" to changelog
• Add method examples

This endpoint can be called with cmdb.cabling.read and retrieves the information which connector is connected of a cable object.

Call Example:

{
    "jsonrpc": "2.0",
    "method": "cmdb.cabling.read",
    "id": 1,
    "params": {
        "objID": 2821,
        "apikey": [{api-key}]
    }
}

Response Example:

{
    "id": 1,
    "jsonrpc": "2.0",
    "result": {
        "start": {
            "presentation": "server11 > server_output11",
            "connector": {
                "id": 2,
                "title": "server_output11",
                "type": "C__CATG__CONNECTOR",
                "inOutput": "Output"
            },
            "ciObject": {
                "id": 162,
                "title": "server11",
                "type": "Server",
                "typeConstant": "C__OBJTYPE__SERVER"
            }
        },
        "end": {
            "presentation": "switch_classic > input_switch11",
            "connector": {
                "id": 3,
                "title": "input_switch11",
                "type": "C__CATG__CONNECTOR",
                "inOutput": "Input"
            },
            "ciObject": {
                "id": 172,
                "title": "switch_classic",
                "type": "Switch",
                "typeConstant": "C__OBJTYPE__SWITCH"
            }
        }
    }
}