Update docs/database/cosmosdb.md

Co-authored-by: Justine Cocchi <[email protected]>

docs/database/cosmosdb.md

@@ -392,7 +392,7 @@ and SHOULD be provided **at span creation time** (if provided at all):
 
 This metric is [required][MetricRequired].
 
-It captures the number of active instances at any given time. Best practices dictate that there should ideally be only one instance of the SDK client per process. Having multiple instances of the SDK client can lead to CPU or memory-related issues.
+It captures the number of active instances at any given time. Best practices dictate that there should ideally be only one instance of the SDK client per Azure Cosmos DB account. Having multiple instances of the SDK client for the same account in a single process can lead to CPU or memory-related issues.
 
 <!-- semconv metric.db.cosmosdb.client.active_instances -->
 <!-- NOTE: THIS TEXT IS AUTOGENERATED. DO NOT EDIT BY HAND. -->