Fix #578: remove mention of 'allow_private'

[leplatrem]

Fix #578

[grahamalama]

Nice.

We should probably also remove these references to private bug:

jira-bugzilla-integration/tests/conftest.py

Line 194 in dbdbc8b

def webhook_create_private_example() -> BugzillaWebhookRequest:

jira-bugzilla-integration/tests/fixtures/factories.py

Line 40 in dbdbc8b

"is_private": False,

jira-bugzilla-integration/jbi/models.py

Lines 177 to 180 in dbdbc8b

	# Private bugs don't include the changes field in the event, but the
	# field names are in the routing key.
	if self.routing_key is not None and self.routing_key[0:11] == "bug.modify:":
	return self.routing_key[11:].split(",")

and maybe I still missed some references.

We should probably also make a note about private comments. Is it possible for a private comment to exist on a public bug? If so, do we want to be syncing that private data?