Improvements

Rook v1.2.6 is a patch release limited in scope and focusing on bug fixes.

Ceph

• Update default Ceph version to v14.2.8 (#4960, @leseb)
• Fix for OSDs on PVCs that were crashing on Ceph v14.2.8 (#4960, @leseb)
• Mount /udev so the osds can discover device info (#5001, @leseb)
• Query for the topology.kubernetes.io labels in K8s 1.17 or newer for the CRUSH hierarchy (#4989, @travisn)
• Log a warning when useAllNodes is true, but nodes are defined in the cluster CR (commit, @travisn)