Patch releases were repurposed to releases that include bug and security
fixes. This commit updates interfaces shown to the public:

* The title of the tracking issue
* The title of the security task issue
* The notification sent at the beginning of the patch release
* The JiHu notification.
* Any other appearence via Slack or message posted by the security
  release pipeline.

Related to gitlab-com/gl-infra/delivery#20093