fix copy/paste error

Change-Id: I22338065e271a17bd8f84fdd185e95e4a0d09ed9

Author: igorbernstein2

google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/internal/csm/metrics/ClientBatchWriteFlowControlFactor.java

@@ -26,7 +26,7 @@
 
 public class ClientBatchWriteFlowControlFactor extends MetricWrapper<ClientSchema> {
   private static final String NAME =
-      "bigtable.googleapis.com/internal/client/batch_write_flow_control_target_qps";
+      "bigtable.googleapis.com/internal/client/batch_write_flow_control_factor";
 
   public ClientBatchWriteFlowControlFactor() {
     super(ClientSchema.INSTANCE, NAME);
@@ -44,7 +44,7 @@ private Recorder(Meter meter) {
           meter
               .gaugeBuilder(NAME)
               .setDescription(
-                  "The current target QPS of the client under batch write flow control.")
+                  "The distribution of batch write flow control factors received from the server.")
               .setUnit("1")
               .build();
     }