docs(hash-stream-node): update README with support for all streams

Author: trivikr

packages/hash-stream-node/README.md

@@ -3,9 +3,7 @@
 [![NPM version](https://img.shields.io/npm/v/@aws-sdk/hash-stream-node/latest.svg)](https://www.npmjs.com/package/@aws-sdk/hash-stream-node)
 [![NPM downloads](https://img.shields.io/npm/dm/@aws-sdk/hash-stream-node.svg)](https://www.npmjs.com/package/@aws-sdk/hash-stream-node)
 
-A utility for calculating the hash of Node.JS readable streams. This package is
-currently only compatible with file streams, as no other stream type can be
-replayed.
+A utility for calculating the hash of Node.JS readable streams.
 
 > An internal package