Update CI readme

Author: philwebb

ci/README.adoc

@@ -1,37 +1,18 @@
 == Concourse pipeline
 
-The pipeline can be deployed using the following command:
+Ensure that you've have a spring-boot target logged in
 
 [source]
 ----
-$ fly -t spring set-pipeline -p spring-boot-2.0.x -c ci/pipeline.yml -l ci/parameters.yml
+$ fly -t spring-boot login -n spring-boot -c https://ci.spring-io
 ----
 
-NOTE: This assumes that you have credhub integration configured with the appropriate
-secrets.
-
-=== Release
-
-To release a milestone:
-
-[source]
-----
-$ fly -t spring trigger-job -j spring-boot-2.0.x/stage-milestone
-$ fly -t spring trigger-job -j spring-boot-2.0.x/promote-milestone
-----
-
-To release an RC:
+The pipeline can be deployed using the following command:
 
 [source]
 ----
-$ fly -t spring trigger-job -j spring-boot-2.0.x/stage-rc
-$ fly -t spring trigger-job -j spring-boot-2.0.x/promote-rc
+$ fly -t spring-boot set-pipeline -p spring-boot-2.0.x -c ci/pipeline.yml -l ci/parameters.yml
 ----
 
-To release a GA:
-
-[source]
-----
-$ fly -t spring trigger-job -j spring-boot-2.0.x/stage-release
-$ fly -t spring trigger-job -j spring-boot-2.0.x/promote-release
-----
+NOTE: This assumes that you have credhub integration configured with the appropriate
+secrets.