[SRU] update os-brick package (to install missing dependencies / tools)

[Christian Rohmann]

Bug https://bugs.launchpad.net/ubuntu/+source/python-os-brick/+bug/1947063 added a few missing tools / dependencies for os-brick.

1) Unfortunately the new os-brick is not yet released as update for Zed, that's still on 6.1.0-0ubuntu1~cloud0. I'd like to suggest a bump here.

2) There is no backport of the fix for os-brick 5.x (for Xena / Yoga). With the Zed release of os-brick "Python 3.6 & 3.7 support has been dropped. The minimum version of Python now supported is Python 3.8.".

But since Ubuntu 20.04 (Focal) comes with Python 3.8 I suppose a bump to os-brick verison 6.2 should be no issue there as well? So I'd like to suggest doing so as well.