[ilAdmins] ILIAS 5.3.21 published

[Fabian Wolf]

Dear all,

We have published release 5.3.21 on GitHub, see 
https://github.com/ILIAS-eLearning/ILIAS/releases/tag/v5.3.21 .

Please have a look at the release notes at 
https://docu.ilias.de/goto_docu_pg_118826_35.html for more information 
about this release.

Best regards,
Fabian Wolf