Update concourse deployment documentation
Update concourse deployment documentation

[#158756296]

Signed-off-by: Norman Sutorius <c92e212d4253616268289a70bdbb216a97333b3e@de.ibm.com>
Signed-off-by: Tobias Zipfel <087edddb12ac44c92ffe5bde7e37fdd0c506a257@de.ibm.com>
Signed-off-by: Norman Sutorius <c92e212d4253616268289a70bdbb216a97333b3e@de.ibm.com>

cloudfoundry-incubator/bits-service-ci,cloudfoundry-incubator/bits-service-ci,cloudfoundry-incubator/bits-service-ci