fixing description

Author: slorello89

dynatrace/src/extension.yaml

@@ -655,7 +655,7 @@ metrics:
 - key: redis.node_avg_latency
   metadata:
     displayName: Node Average Latency
-    description: Average latency of requests handled by endpoints on node (seconds); returned only when there is traffic
+    description: Average latency of requests handled by endpoints on node (milliseconds); returned only when there is traffic
     unit: Millisecond
     tags:
     - "Redis"