doc: fix version history for "exports" patterns

Refs: #34718

PR-URL: #38355
Reviewed-By: Guy Bedford <guybedford@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Shingo Inoue <leko.noor@gmail.com>

doc/api/packages.md

@@ -335,7 +335,7 @@ analogous to the exports field.
 <!--YAML
 added:
   - v14.13.0
-  - v12.19.0
+  - v12.20.0
 -->
 
 For packages with a small number of exports or imports, we recommend
@@ -1031,6 +1031,7 @@ added: v12.7.0
 changes:
   - version:
     - v14.13.0
+    - v12.20.0
     pr-url: https://github.com/nodejs/node/pull/34718
     description: Add support for `"exports"` patterns.
   - version: