Bump testcontainers.version from 1.20.1 to 1.20.3 #711

Job	Run time
build (ubuntu-latest, 11, Client, false)	7m 25s
build (ubuntu-latest, 11, Server, false)	19m 17s
build (ubuntu-latest, 11, Core, false)	11m 26s
build (ubuntu-latest, 11, External, false)	12m 22s
build (ubuntu-latest, 11, Check-Updated-License-Files, false)	5m 31s
build (ubuntu-latest, 11, Integration-Test, false)	6m 57s
build (ubuntu-latest, 17, Client, false)	7m 42s
build (ubuntu-latest, 17, Server, false)	32m 38s
build (ubuntu-latest, 17, Core, false)	11m 11s
build (ubuntu-latest, 17, External, false)	12m 31s
build (ubuntu-latest, 17, Check-Updated-License-Files, false)	5m 44s
build (ubuntu-latest, 17, Integration-Test, false)	6m 48s
build (ubuntu-latest, 21, Client, false)	7m 1s
build (ubuntu-latest, 21, Server, false)	18m 22s
build (ubuntu-latest, 21, Core, false)	10m 44s
build (ubuntu-latest, 21, External, false)	11m 41s
build (ubuntu-latest, 21, Check-Updated-License-Files, false)	5m 56s
build (ubuntu-latest, 21, Integration-Test, false)	7m 15s
	3h 20m 31s

Provide feedback