[DOCS] Fix link to ML node description
If you want to use {ml-features}, there must be at least one {ml} node in
your cluster and all master-eligible nodes must have {ml} enabled. By default,
all nodes are {ml} nodes. For more information about these settings, see
-{ref}/modules-node.html#modules-node-xpack[{ml} nodes].
+{ref}/modules-node.html#ml-node[{ml} nodes].
To use the {ml-features} to analyze your data, you must create a job and
send your data to that job.
