Update using.md

Wording change

Author: mickeyboxell

docs/using.md

@@ -75,7 +75,7 @@ Dimensions can be used to add specificity to your graphs. To use dimensions crea
 
 ## Custom Metrics and Namespaces
 
-Oracle Cloud Infrastructure allows for the creation of [custom metrics namespaces](https://docs.cloud.oracle.com/iaas/Content/Monitoring/Tasks/publishingcustommetrics.htm), which can be used to ingest data from sources in addition to the native Oracle Cloud Infrastructure resources available by default. For example, an application could be instrumented to gather statistics about individual operations. The resource posting custom metrics must be able to authenticate to Oracle Cloud Infrastructure using either using the Oracle Cloud Infrastructure CLI authentication mentioned above or using [instance principals](https://docs.cloud.oracle.com/iaas/Content/Identity/Tasks/callingservicesfrominstances.htm). In the example below you can see the option to select `custom_namespace` from the **Namespace** drop down. 
+Oracle Cloud Infrastructure allows you to create [custom metrics namespaces](https://docs.cloud.oracle.com/iaas/Content/Monitoring/Tasks/publishingcustommetrics.htm), which can be used to ingest data from sources in addition to the native Oracle Cloud Infrastructure resources available by default. For example, an application could be instrumented to gather statistics about individual operations. The resource posting custom metrics must be able to authenticate to Oracle Cloud Infrastructure using either using the Oracle Cloud Infrastructure CLI authentication mentioned above or using [instance principals](https://docs.cloud.oracle.com/iaas/Content/Identity/Tasks/callingservicesfrominstances.htm). In the example below you can see the option to select `custom_namespace` from the **Namespace** drop down. 
 
 ![Screen_Shot_2019-02-15_at_2.53.37_PM](images/Screen_Shot_2019-02-15_at_2.53.37_PM.png)