Update driver-core/src/main/com/mongodb/internal/connection/OperationContext.java

Co-authored-by: Ross Lawley <ross.lawley@gmail.com>

Author: vbabanin

driver-core/src/main/com/mongodb/internal/connection/OperationContext.java

@@ -217,6 +217,7 @@ public OperationContext withOverride(final TimeoutContextOverride timeoutContext
     public static final class ServerDeprioritization {
         @Nullable
         private ServerAddress candidate;
+        @Nullable
         private ClusterType clusterType;
         private final Set<ServerAddress> deprioritized;