update RefreshLiveness naming (#31354)

diff --git a/src/app/ReadClient.cpp b/src/app/ReadClient.cpp
index f89c8be..4e12b5a 100644
--- a/src/app/ReadClient.cpp
+++ b/src/app/ReadClient.cpp
@@ -617,7 +617,7 @@
             // a subscription and have a valid value for mMaxInterval which the function
             // relies on.
             //
-            mpCallback.RefreshLiveness(*this);
+            mpCallback.NotifySubscriptionStillActive(*this);
             err = RefreshLivenessCheckTimer();
         }
     }
diff --git a/src/app/ReadClient.h b/src/app/ReadClient.h
index ebe4de8..f1226a4 100644
--- a/src/app/ReadClient.h
+++ b/src/app/ReadClient.h
@@ -90,7 +90,7 @@
          * receives an OnDone call to destroy the object.
          *
          */
-        virtual void RefreshLiveness(const ReadClient & apReadClient) {}
+        virtual void NotifySubscriptionStillActive(const ReadClient & apReadClient) {}
 
         /**
          * Used to signal the commencement of processing of the first attribute or event report received in a given exchange.