HADOOP-16755. Fix broken link in single node cluster setup documentation. Contributed by Denes Gerencser.

hadoop-common-project/hadoop-common/src/site/markdown/SingleCluster.md.vm

@@ -130,7 +130,7 @@ If you cannot ssh to localhost without a passphrase, execute the following comma
 
 $H3 Execution
 
-The following instructions are to run a MapReduce job locally. If you want to execute a job on YARN, see [YARN on Single Node](#YARN_on_Single_Node).
+The following instructions are to run a MapReduce job locally. If you want to execute a job on YARN, see [YARN on Single Node](#YARN_on_a_Single_Node).
 
 1.  Format the filesystem: