Update installation instructions for Debian 11 - Bullseye
Hi Current installation instructions for Debian cover Debian 8, 9 and 10.
As Debian 11 was released this Saturday (2021-08-14), it would be great to update the installation instructions too.
Note: Currently I run on Debian 11 the Datovka v4.17.0, which I have installed before when on Debian 10. All seems functional so far.