### Preflight checklist - [X] I could not find a solution in the existing issues, docs, nor discussions. - [X] I agree to follow this project's [Code of Conduct](https://github.com/ory/hydra/blob/master/CODE_OF_CONDUCT.md). - [X] I have read and am following this repository's [Contribution Guidelines](https://github.com/ory/hydra/blob/master/CONTRIBUTING.md). - [X] I have joined the [Ory Community Slack](https://slack.ory.sh). - [X] I am signed up to the [Ory Security Patch Newsletter](https://ory.us10.list-manage.com/subscribe?u=ffb1a878e4ec6c0ed312a3480&id=f605a41b53). ### Ory Network Project _No response_ ### Describe the bug UPGRADE.md is out of date. No upgrade guide for 2.2 ### Reproducing the bug Read UPGRADE.md ### Relevant log output _No response_ ### Relevant configuration _No response_ ### Version 2.1.2 ### On which operating system are you observing this issue? Linux ### In which environment are you deploying? None ### Additional Context This upgrade guide was linked in the email communication for 2.2. Please fix.