[DRBD-announce] linstor-server 1.21.1 release

Hi!

A small patch release, which disables, the default enabled automatic
resync-after option for DRBD resources.
We got reports of DRBD problems with the resync-after option set, so to not
trigger more incidents we decided to disable it for now.

## [1.21.1] - 2023-03-22

### Changed

- auto-resync-after for DRBD will be disabled by default (because it can
trigger a DRBD bug)

### Fixed

- Fixed available size reported by query-size-info API

https://pkg.linbit.com//downloads/linstor/linstor-server-1.21.1.tar.gz


Linstor PPA:
https://launchpad.net/~linbit/+archive/ubuntu/linbit-drbd9-stack

Cheers,
Rene