Bump alembic from 1.8.1 to 1.9.0 in /server

Bumps [alembic](https://github.com/sqlalchemy/alembic) from 1.8.1 to 1.9.0.
- [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-minor
...

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

Author: dependabot[bot]

server/requirements.txt

@@ -14,7 +14,7 @@ scipy==1.9.2
 # end of remember to change in Dockerfile
 sentry-sdk[pure_eval]==1.11.1
 prometheus_client==0.14.1
-alembic==1.8.1
+alembic==1.9.0
 mako==1.2.4
 pandas==1.1.5
 python-jose[cryptography]==3.3.0