Update deployment example documentation

Author: thegridman

examples/deployment/README.md

@@ -683,7 +683,7 @@ install any of the examples above.
    
     kubectl -n coherence-example label configmap demo-grafana-datasource grafana_datasource=1  
 
-    kubectl -n coherence-example create -f https://oracle.github.io/coherence-operator/dashboards/3.1.1/coherence-grafana-dashboards.yaml
+    kubectl -n coherence-example create -f https://oracle.github.io/coherence-operator/dashboards/3.1.0/coherence-grafana-dashboards.yaml
 
     kubectl -n coherence-example label configmap coherence-grafana-dashboards grafana_dashboard=1
     ```