[docs] Fix broken link in page Testing (#6145)
[docs] Fix broken link in page Testing (#6145)

Also-By: Alberto Scotto <c8a050709e1880c3f2caabd104ad0bf7aad94f0f@users.noreply.github.com>
Signed-off-by: Kai Kreuzer <31ea678c44dc4e8e22ccfd165592dd71a30e46ae@openhab.org>
Snickermicker/smarthome,Snickermicker/smarthome,Snickermicker/smarthome,Snickermicker/smarthome