[Documentation Update] Update Mysql and Postgres tests example URLs (#2832)

Tests url was outdated.

Author: muzir

docs/modules/databases/jdbc.md

@@ -115,5 +115,5 @@ Note that if you use `@Rule`, you will be given an isolated container for each t
 
 Examples/Tests:
 
- * [MySQL](https://github.com/testcontainers/testcontainers-java/blob/master/modules/jdbc-test/src/test/java/org/testcontainers/junit/SimpleMySQLTest.java)
- * [PostgreSQL](https://github.com/testcontainers/testcontainers-java/blob/master/modules/jdbc-test/src/test/java/org/testcontainers/junit/SimplePostgreSQLTest.java)
+ * [MySQL](https://github.com/testcontainers/testcontainers-java/blob/master/modules/mysql/src/test/java/org/testcontainers/junit/mysql/SimpleMySQLTest.java)
+ * [PostgreSQL](https://github.com/testcontainers/testcontainers-java/blob/master/modules/postgresql/src/test/java/org/testcontainers/junit/postgresql/SimplePostgreSQLTest.java)