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

Tests url was outdated.
outofcoffee/testcontainers-java,testcontainers/testcontainers-java,rnorth/test-containers,rnorth/test-containers,outofcoffee/testcontainers-java,rnorth/test-containers,outofcoffee/testcontainers-java,testcontainers/testcontainers-java,testcontainers/testcontainers-java