config.yaml description for osd-devices still references directory based OSDs

[Drew Freiberger]

There is discrepancy between the readme and release notes and the osd-devices config.yaml description.

The readme notes:
Note: OSD directories can no longer be created starting with Ceph Nautilus. Existing OSD directories will continue to function after an upgrade to Nautilus.

The osd-devices config.yaml description says:
For ceph >= 0.56.6 these can also be directories instead of devices - the charm assumes anything not starting with /dev is a directory instead.

This should probably be updated to reflect 14.0.0 > ceph >= 0.56.6, or add the nautilus+ caveat in the config.yaml.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/759302

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/759302
Committed: https://git.openstack.org/cgit/openstack/charm-ceph-osd/commit/?id=6abe0f8d3aec5ad62403149d2c1e079b4cfc5f69
Submitter: Zuul
Branch: master

commit 6abe0f8d3aec5ad62403149d2c1e079b4cfc5f69
Author: Peter Matulis <email address hidden>
Date: Thu Oct 22 12:55:10 2020 -0400

    Clarify config.yaml re dir-based OSDs

    Closes-Bug: #1901058

    Change-Id: I47a51e17366f3b5cc873b83c5ac92bbd368bf503