Adding API mention to temp private fork section (#46816)

Co-authored-by: Sarah Edwards <[email protected]>

Author: KateCatlin

content/code-security/security-advisories/working-with-repository-security-advisories/collaborating-in-a-temporary-private-fork-to-resolve-a-repository-security-vulnerability.md

@@ -50,6 +50,8 @@ To keep information about vulnerabilities secure, integrations, including CI, ca
 
 For example, if you create a temporary private fork in a repository called `octocat-repo`, and the automatically generated ID for the draft advisory is `GHSA-x854-cvjg-vx26`, the temporary fork will be called `octocat-repo-ghsa-x854-cvjg-vx26`.
 
+You can also use the REST API to create temporary private forks. For more information, see "[Create a temporary private fork](/rest/security-advisories/repository-advisories#create-a-temporary-private-fork)" in the REST API documentation.
+
 ## Adding collaborators to a temporary private fork
 
 Anyone with admin permissions to a security advisory can add additional collaborators to the security advisory, and collaborators on the security advisory can access the temporary private fork. For more information, see "[AUTOTITLE](/code-security/security-advisories/working-with-repository-security-advisories/adding-a-collaborator-to-a-repository-security-advisory)."