fix prometheus readme: bld phase/reason conversion to all lower case was reverted

Author: gabemontero

examples/prometheus/README.md

@@ -119,26 +119,26 @@ Returns PLEG (pod lifecycle event generator) latency metrics.  This represents t
 
 ### OpenShift build related queries
 
-> count(openshift_build_active_time_seconds{phase="running"} < time() - 600)
+> count(openshift_build_active_time_seconds{phase="Running"} < time() - 600)
 
 Returns the number of builds that have been running for more than 10 minutes (600 seconds).
 
-> count(openshift_build_active_time_seconds{phase="pending"} < time() - 600)
+> count(openshift_build_active_time_seconds{phase="Pending"} < time() - 600)
 
 Returns the number of build that have been waiting at least 10 minutes (600 seconds) to start.
 
-> sum(openshift_build_total{phase="failed"})
+> sum(openshift_build_total{phase="Failed"})
 
 Returns the number of failed builds, regardless of the failure reason.
 
-> openshift_build_total{phase="failed",reason="fetchsourcefailed"}
+> openshift_build_total{phase="failed",reason="FetchSourceFailed"}
 
 Returns the number of failed builds because of problems retrieving source from the associated Git repository.
 
-> sum(openshift_build_total{phase="complete"})
+> sum(openshift_build_total{phase="Complete"})
 
 Returns the number of successfully completed builds.
 
-> openshift_build_total{phase="failed"} offset 5m
+> openshift_build_total{phase="Failed"} offset 5m
 
 Returns the failed builds totals, per failure reason, from 5 minutes ago.