Bump alembic from 1.11.1 to 1.11.2 in /bodhi-server

Bumps [alembic](https://github.com/sqlalchemy/alembic) from 1.11.1 to 1.11.2.
- [Release notes](https://github.com/sqlalchemy/alembic/releases)
- [Changelog](https://github.com/sqlalchemy/alembic/blob/main/CHANGES)
- [Commits](https://github.com/sqlalchemy/alembic/commits)

---
updated-dependencies:
- dependency-name: alembic
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>