HDFS-15538. Fix the documentation for dfs.namenode.replication.max-streams in hdfs-default.xml. Contributed by Xieming Li.

hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml

@@ -5027,7 +5027,7 @@
   <name>dfs.namenode.replication.max-streams</name>
   <value>2</value>
   <description>
-    Hard limit for the number of highest-priority replication streams.
+    Hard limit for the number of replication streams other than those with highest-priority.
   </description>
 </property>