Revert "[11.x] Bump supported database versions" (#9113)

* Revert "Update database.md (#9017)"

This reverts commit c58a6cb.

* Update database.md

Co-authored-by: Julius Kiekbusch <contact@julius-kiekbusch.de>

---------

Co-authored-by: Taylor Otwell <taylor@laravel.com>
Co-authored-by: Julius Kiekbusch <contact@julius-kiekbusch.de>

Author: 3 people

database.md

@@ -19,9 +19,9 @@ Almost every modern web application interacts with a database. Laravel makes int
 
 <div class="content-list" markdown="1">
 
-- MariaDB 10.11+ ([Version Policy](https://mariadb.org/about/#maintenance-policy))
-- MySQL 8.0+ ([Version Policy](https://en.wikipedia.org/wiki/MySQL#Release_history))
-- PostgreSQL 12.0+ ([Version Policy](https://www.postgresql.org/support/versioning/))
+- MariaDB 10.3+ ([Version Policy](https://mariadb.org/about/#maintenance-policy))
+- MySQL 5.7+ ([Version Policy](https://en.wikipedia.org/wiki/MySQL#Release_history))
+- PostgreSQL 10.0+ ([Version Policy](https://www.postgresql.org/support/versioning/))
 - SQLite 3.35.0+
 - SQL Server 2017+ ([Version Policy](https://docs.microsoft.com/en-us/lifecycle/products/?products=sql-server))