Request to add Liam ERD (#453)

* Request to add Liam ERD

* Update README.md

Author: MH4GF

README.md

@@ -181,6 +181,7 @@ For updates on `awesome-db-tools` and thoughts/news about databases/tools/SQL fo
 - [DrawDB](https://github.com/drawdb-io/drawdb) - Free, simple, and intuitive online database design tool and SQL generator. 
 - [ERAlchemy](https://github.com/Alexis-benoist/eralchemy) - Entity Relation Diagrams generation tool.
 - [ERD Lab](https://www.erdlab.io/) - Free cloud based entity relationship diagram (ERD) tool made for developers.
+- [Liam ERD](https://github.com/liam-hq/liam) - Open-source tool that generates beautiful and easy-to-read Entity Relationship Diagrams from your database and ORMs.
 - [QuickDBD](https://www.quickdatabasediagrams.com/) - Simple online tool to quickly draw database diagrams.
 
 ### Documentations