Remove unnecessary backslashes

Removed unnecessary backslashes in a codeblock.

-------
cc: @flang-msft

Author: tksh164

articles/partner-solutions/new-relic/new-relic-how-to-configure-prereqs.md

@@ -23,10 +23,10 @@ To set up New Relic on Azure, you need to register the `NewRelic.Observability`
 - To register the resource provider in the Azure CLI, use this command:
 
   ```azurecli
-  az provider register \--namespace NewRelic.Observability \--subscription \<subscription-id\>
+  az provider register --namespace NewRelic.Observability --subscription <subscription-id>
   ```
 
 ## Next steps
 
 - [Quickstart: Get started with New Relic](new-relic-create.md)
-- [Troubleshoot Azure Native New Relic Service](new-relic-troubleshoot.md)
+- [Troubleshoot Azure Native New Relic Service](new-relic-troubleshoot.md)