Plugin Writer guide mentions of publish task (publisher vs publication) are out of date

[pulpbot]

Author: amacdona@redhat.com (amacdona@redhat.com)

Redmine Issue: 4782, https://pulp.plan.io/issues/4782

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The publish task is no longer dispatched by the publisher, it is dispatched by publication create.

A quick skim shows that the docs should be updated in multiple places:
https://docs.pulpproject.org/en/pulpcore-plugin/nightly/reference/object-relationships.html
https://docs.pulpproject.org/en/pulpcore-plugin/nightly/plugin-writer/plugin-walkthrough.html#define-your-plugin-publisher

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[gerrod3]

Outdated.