Github action for updating an RTD version

[andy-maier]

RTD provides a REST API with a "Version update" call (https://docs.readthedocs.io/en/stable/api/v3.html#version-update) that can be used to modify the attributes of a version.

Provide a Github action that encapsulates that API call and supports modifying the attributes of a version.

This would be useful to hide a previous fix version after a new fix version != 0 has been created. (RTD has automation rules, but they do not currently support that, see readthedocs/readthedocs.org#11556)

[humitos]

Provide a Github action that encapsulates that API call

I think it would be a good idea to provide a GitHub Action that wraps APIv3 completely as a generic solution 👍🏼