Update docs/integrations/databases/opentelemetry/cassandra-opentelemetry.md

Author: kimsauce

docs/integrations/databases/opentelemetry/cassandra-opentelemetry.md

@@ -203,7 +203,7 @@ Following is a query from the Cassandra app's **Cassandra - Overview** dashboard
 Following is the query from Cassandra App's overview Dashboard's Number of Requests Panel:
 
 ```sql
-sumo.datasource=cassandra deployment.environment=* db.cluster.name=* db.node.name=* metric=cassandra.client.request.count | sum
+sumo.datasource=cassandra deployment.environment=* db.cluster.name=* db.node.name=* metric=cassandra.client.request.count | sum 
 ```
 
 ## Viewing Cassandra dashboards