Update src/main/java/org/opensearch/knn/plugin/search/KNNConcurrentSe…

…archRequestDecider.java

Co-authored-by: Navneet Verma <vermanavneet003@gmail.com>
Signed-off-by: Tejas Shah <shatejas@amazon.com>

src/main/java/org/opensearch/knn/plugin/search/KNNConcurrentSearchRequestDecider.java

@@ -32,7 +32,7 @@ public class KNNConcurrentSearchRequestDecider extends ConcurrentSearchRequestDe
     );
     private static final ConcurrentSearchDecision YES = new ConcurrentSearchDecision(
         ConcurrentSearchDecision.DecisionStatus.YES,
-        "Enable concurrent search for knn"
+        "Enable concurrent search for knn as Query has k-NN query in it and index is k-nn index"
     );
 
     private ConcurrentSearchDecision knnDecision = DEFAULT_KNN_DECISION;