Fix typo

Json -> JSON

Author: changeworld

articles/healthcare-apis/azure-api-for-fhir/enable-diagnostic-logging.md

@@ -20,7 +20,7 @@ In this article, you learn how to enable diagnostic logging in Azure API for FHI
 
 You can view the metrics under Monitoring | Metrics from the portal. The metrics include Number of Requests, Average Latency, Number of Errors, Data Size, request units (RUs) Used, Number of requests that exceeded capacity, and Availability (in %). The Total Request Metrics provides the number of requests reaching the FHIR service. This means requests such as FHIR bundles are considered as single request for logging. 
 
-The following screenshot shows RUs used for a sample environment with few activities in the last seven days. You can download the data in Json format.
+The following screenshot shows RUs used for a sample environment with few activities in the last seven days. You can download the data in JSON format.
 
    :::image type="content" source="media/diagnostic-logging/fhir-metrics-rus-screen.png" alt-text="Azure API for FHIR Metrics from the portal" lightbox="media/diagnostic-logging/fhir-metrics-rus-screen.png":::