Update configuration.prod.yaml

configuration.prod.yaml

@@ -29,7 +29,7 @@ loggers:
         description: prod application insights
         resourceId: "/subscriptions/[your guid here]/resourceGroups/rg-apim-lab-prod/providers/microsoft.insights/components/[destination environment application insights name]"
         credentials:
-          instrumentationKey: "[namedvalue in the destination environment that will store your target application insights name. Refer to the wiki at https://github.com/Azure/apiops/wiki/APIM-resources#loggers for ways on improving the default namedvalues that get generated by apim]"
+          instrumentationKey: "{{ [namedvalue in the destination environment that will store your target application insights name. Refer to the wiki at https://github.com/Azure/apiops/wiki/APIM-resources#loggers for ways on improving the default namedvalues that get generated by apim] }}"
         isBuffered: true
 diagnostics:
    - name: applicationinsights