doc: update releaser in v12.18.4 changelog

PR-URL: #35217
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>

Author: BethGriggs

doc/changelogs/CHANGELOG_V12.md

@@ -584,7 +584,7 @@
 * [[`d60b13f2e3`](https://github.com/nodejs/node/commit/d60b13f2e3)] - **zlib**: switch to lazy init for zlib streams (Andrey Pechkurov) [#34048](https://github.com/nodejs/node/pull/34048)
 
 <a id="12.18.4"></a>
-## 2020-09-15, Version 12.18.4 'Erbium' (LTS), @targos
+## 2020-09-15, Version 12.18.4 'Erbium' (LTS), @BethGriggs prepared by @targos
 
 ### Notable Changes