doc: update post sec release process

PR-URL: #56907
Fixes: nodejs-private/security-release#52
Reviewed-By: Michael Dawson <[email protected]>
Reviewed-By: Ulises Gascón <[email protected]>
Reviewed-By: Yagiz Nizipli <[email protected]>
Reviewed-By: Marco Ippolito <[email protected]>

Author: RafaelGSS

doc/contributing/security-release-process.md

@@ -156,14 +156,10 @@ security announcements for more information.
 
 ## Post-Release
 
-* [ ] 1\. **Merge the Next Security Release PR:**
-  * This involves moving the `vulnerabilities.json` file from
-    `security-release/next-security-release` to the `security-release/YYYY-MM-DD`
-    folder and merging the PR.
-
-* [ ] 2\. **Cleanup:**
+* [ ] 1\. **Cleanup:**
   * [ ] `git node security --cleanup`. This command will:
-  * Close PRs and backports.
+  * Update next-security-release folder
+  * Close all PRs and backports labeled with `Security Release`.
   * Close HackerOne reports:
     * Close Resolved
     * Request Disclosure