HADOOP-16008. Fix typo in CommandsManual.md

Signed-off-by: Akira Ajisaka <aajisaka@apache.org>

hadoop-common-project/hadoop-common/src/site/markdown/CommandsManual.md

@@ -174,7 +174,7 @@ Commands useful for administrators of a hadoop cluster.
 Usage:
 
     hadoop daemonlog -getlevel <host:port> <classname> [-protocol (http|https)]
-    hdoop daemonlog -setlevel <host:port> <classname> <level> [-protocol (http|https)]
+    hadoop daemonlog -setlevel <host:port> <classname> <level> [-protocol (http|https)]
 
 | COMMAND\_OPTION | Description |
 |:---- |:---- |