Cumulus 2.6.3 is released

[Yiming Yang]

Hello All,

Cumulus version 2.6.3 is released.

This is a small bug-fix release. The release notes can be viewed at https://github.com/lilab-bcb/cumulus/releases/tag/2.6.3.

The workflows are published on Docker store at https://dockstore.org/organizations/lilab/collections/Cumulus.

The user guide documentation is at https://cumulus.readthedocs.io/en/2.6.3/.

Sincerely,

Yiming