fix: wrong range scan pending metrics counter (#200)

fix wrong metrics counter

client/src/main/java/io/streamnative/oxia/client/AsyncOxiaClientImpl.java

@@ -682,7 +682,7 @@ public void onNext(long shardId, GetResult result) {
 
                     @Override
                     public void onError(Throwable throwable) {
-                        gaugePendingListRequests.decrement();
+                        gaugePendingRangeScanRequests.decrement();
                         histogramRangeScanLatency.recordFailure(System.nanoTime() - startTime);
                         consumer.onError(throwable);
                     }