Nuke: color settings for render write node is working now

[jakubjezek001]

Brief description

Getting correct settings for write node was not working.

Additional info

Key name in avalon data was defined as family but in reality in settings and in publishing plugins we are using families.

Testing notes:

1. open nuke workfile and create render write node.
2. open settings and go to project_anatomy/imageio/nuke/nodes/requiredNodes/0/knobs/6/value and set to different colorspace setting.
3. Save settings and then go back to nuke and in openpype menu chose Apply all
4. colorspace on write node should change (this can only be seen inside the write node group)

[jrsndl]

Works as described. Tested In Nuke 12.2v3