Update doc/api/stream.md

Co-Authored-By: Matteo Collina <matteo.collina@gmail.com>

Author: ronag

doc/api/stream.md

@@ -1095,7 +1095,7 @@ added: REPLACEME
 Getter for the property `encoding` of a given `Readable` stream. The `encoding`
 property can be set using the [`readable.setEncoding()`][] method.
 
-##### readable.readableFinished
+##### readable.readableEnded
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