v0.21.1: Version update (patch) (#686)
* Bump version: 0.21.0 → 0.21.1 Works with frontend version 0.2.1 --------- Co-authored-by: DiamondLightSource-build-server <DiamondLightSource-build-server@users.noreply.github.com>
* Bump version: 0.21.0 → 0.21.1 Works with frontend version 0.2.1 --------- Co-authored-by: DiamondLightSource-build-server <DiamondLightSource-build-server@users.noreply.github.com>