doc: fix typo in stream.finished documentation

PR-URL: #49271
Refs: https://nodejs.org/api/stream.html#streamfinishedstream-options
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Trivikram Kamat <[email protected]>
Reviewed-By: Qingyu Deng <[email protected]>

Author: aduh95

doc/api/stream.md

@@ -278,7 +278,7 @@ run().catch(console.error);
 rs.resume(); // Drain the stream.
 ```
 
-The `finished` API provides [callback version][stream-finished]:
+The `finished` API also provides a [callback version][stream-finished].
 
 ### Object mode