doc: fix added version for readable.closed/destroyed

Signed-off-by: Matthew Peveler <matt.peveler@gmail.com>
PR-URL: #44033
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: MasterOdin

doc/api/stream.md

@@ -1110,7 +1110,7 @@ Implementors should not override this method, but instead implement
 ##### `readable.closed`
 
 <!-- YAML
-added: v8.0.0
+added: v18.0.0
 -->
 
 * {boolean}
@@ -1120,7 +1120,7 @@ Is `true` after `'close'` has been emitted.
 ##### `readable.destroyed`
 
 <!-- YAML
-added: v18.0.0
+added: v8.0.0
 -->
 
 * {boolean}