Hotfix release 21.02.1 (#5126)

* Cherry-pick "Fix project usersWithActiveTasks query (#5115)" and create
21.02.1 release

* Fix project usersWithActiveTasks query
* changelog
* Merge branch 'master' into user-email-complex-query
* Merge branch 'master' of github.com:scalableminds/webknossos into release-21.02.1
* also update migrations.md with empty migration section

CHANGELOG.released.md

@@ -7,6 +7,11 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Calendar Versioning](http://calver.org/) `0Y.0M.MICRO`.
 For upgrade instructions, please check the [migration guide](MIGRATIONS.released.md).
 
+## [21.02.1](https://github.com/scalableminds/webknossos/releases/tag/21.02.1) - 2021-02-03
+[Commits](https://github.com/scalableminds/webknossos/compare/21.02.0...21.02.1)
+
+### Fixed
+- Fixed a bug where the listing of users that have open tasks of a project failed. [#5115](https://github.com/scalableminds/webknossos/pull/5115)
 
 ## [21.02.0](https://github.com/scalableminds/webknossos/releases/tag/21.02.0) - 2021-01-20
 [Commits](https://github.com/scalableminds/webknossos/compare/21.01.0...21.02.0)

MIGRATIONS.released.md

@@ -5,6 +5,10 @@ See `MIGRATIONS.unreleased.md` for the changes which are not yet part of an offi
 This project adheres to [Calendar Versioning](http://calver.org/) `0Y.0M.MICRO`.
 User-facing changes are documented in the [changelog](CHANGELOG.released.md).
 
+## [21.02.1](https://github.com/scalableminds/webknossos/releases/tag/21.02.1) - 2021-02-03
+[Commits](https://github.com/scalableminds/webknossos/compare/21.02.0...21.02.1)
+No migrations necessary.
+
 ## [21.02.0](https://github.com/scalableminds/webknossos/releases/tag/21.02.0) - 2021-01-20
 - [060-multiusers.sql](conf/evolutions/060-multiusers.sql) (Note that its reversion can only be performed if there are no multiple users per multiuser yet)