* Upgrade Mjolnir from 1.1.20 to version 1.2.1
https://hub.docker.com/r/matrixdotorg/mjolnir/tags
using the "latest" tag seems inefficient as it doesn't actually redirect to the latest release
In any case, the latest release is now 1.2.1
docker pull matrixdotorg/mjolnir:v1.2.1
* Fixup
Co-authored-by: Slavi Pantaleev <slavi@devture.com>