Change the inroduced milestone of issuable_template feature

doc/user/project/issues/managing_issues.md

@@ -160,7 +160,7 @@ To regenerate the email address:
 
 ### Using a URL with prefilled values
 
-> Ability to use both `issuable_template` and `issue[description]` in the same URL [introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/340529) in GitLab 14.8.
+> Ability to use both `issuable_template` and `issue[description]` in the same URL [introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/80554) in GitLab 14.9.
 
 To link directly to the new issue page with prefilled fields, use query
 string parameters in a URL. You can embed a URL in an external