Chronos exporter: Fixed minor bug in demo configuration under Bengaluru site

Change-Id: I44b6c13013e5b582fd224656002e5ac720b6970b
diff --git a/chronos-exporter/files/configs/demo-configuration.yaml b/chronos-exporter/files/configs/demo-configuration.yaml
index de64f1e..60c775e 100644
--- a/chronos-exporter/files/configs/demo-configuration.yaml
+++ b/chronos-exporter/files/configs/demo-configuration.yaml
@@ -380,7 +380,7 @@
         display-name: Phones Slice
         device-groups:
           - phones-north
-          - phone-south
+          - phones-south
         applications:
           - expenses-application
       - slice-id: bengaluru-slice-drones