Fix pipeline reference

Author: snicoll

ci/README.adoc

@@ -51,7 +51,7 @@ The pipeline can be deployed using the following command:
 
 [source]
 ----
-$ fly -t spring set-pipeline -p spring-framework-6.0.x -c ci/pipeline.yml -l ci/parameters.yml
+$ fly -t spring set-pipeline -p spring-framework-6.1.x -c ci/pipeline.yml -l ci/parameters.yml
 ----
 
 NOTE: This assumes that you have credhub integration configured with the appropriate secrets.