doc: fix package.json "imports" field history

Refs: #34117

PR-URL: #38356
Reviewed-By: Guy Bedford <guybedford@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Shingo Inoue <leko.noor@gmail.com>

doc/api/packages.md

@@ -1073,7 +1073,9 @@ All paths defined in the `"exports"` must be relative file URLs starting with
 
 ### `"imports"`
 <!-- YAML
-added: v14.6.0
+added:
+ - v14.6.0
+ - v12.19.0
 -->
 
 * Type: {Object}