Updating xmldoc - remarks on MessageHandlerOptions.MaxAutoRenewDurati…

…on (#6951)

Mentioning that there could be false-negative lockLost exceptions that could be raised.
Related to #6723

sdk/servicebus/Microsoft.Azure.ServiceBus/src/MessageHandlerOptions.cs

@@ -64,6 +64,8 @@ public int MaxConcurrentCalls
         /// <summary>Gets or sets the maximum duration within which the lock will be renewed automatically. This
         /// value should be greater than the longest message lock duration; for example, the LockDuration Property. </summary>
         /// <value>The maximum duration during which locks are automatically renewed.</value>
+        /// <remarks>The message renew can continue for sometime in the background
+        /// after completion of message and result in a few false MessageLockLostExceptions temporarily.</remarks>
         public TimeSpan MaxAutoRenewDuration
         {
             get => this.maxAutoRenewDuration;