chore(deps-dev): bump org.testcontainers:testcontainers from 1.19.3 to 1.19.6 in /retail-store-sample-app/src/cart

chore(deps-dev): bump org.testcontainers:testcontainers from 1.19.3 to 1.19.6 in /retail-store-sample-app/src/cart #56