Update Databasus description

Used https://github.com/awesome-selfhosted/awesome-selfhosted-data/pull/1903 as the basis of the new description.

README.md

@@ -93,7 +93,7 @@ _See also: [Restic's list of Linux backup software](https://github.com/restic/ot
 - [BorgBackup](https://www.borgbackup.org/) - Deduplicating archiver with compression and authenticated encryption. ([Source Code](https://github.com/borgbackup/borg)) `BSD-3-Clause` `Python`
 - [Burp](https://burp.grke.org/) - Network backup and restore program. ([Source Code](https://github.com/grke/burp)) `AGPL-3.0` `C`
 - [Dar](http://dar.linux.free.fr/) - Which stands for Disk ARchive, is a robust and rich featured archiving and backup software of the tar style. ([Source Code](https://github.com/Edrusb/DAR)) `GPL-2.0` `C++`
-- [Databasus](https://databasus.com/) - Self-hosted tool to backup databases. ([Source Code](https://github.com/databasus/databasus)) `Apache-2.0` `Docker`
+- [Databasus](https://databasus.com/) - PostgreSQL, MySQL, MariaDB and MongoDB backup tool with web UI, external storages (local, S3, FTP, Google Drive, etc.), notifications (webhook, Discord, Slack, etc.) and team management. ([Source Code](https://github.com/databasus/databasus)) `Apache-2.0` `Docker`
 - [Duplicati](https://www.duplicati.com) - Backup client that securely stores encrypted, incremental, compressed backups on cloud storage services and remote file servers. ([Source Code](https://github.com/duplicati/duplicati)) `LGPL-2.1` `C#`
 - [Duplicity](https://duplicity.gitlab.io/) - Encrypted bandwidth-efficient backup using the rsync algorithm. ([Source Code](https://gitlab.com/duplicity/duplicity)) `GPL-2.0` `Python`
 - [Open Archiver](https://docs.openarchiver.com) - Email archiving solution with full-text search and eDiscovery search features. ([Source Code](https://github.com/LogicLabs-OU/OpenArchiver)) `AGPL-3.0` `Docker`