Bump sqlalchemy from 1.3.22 to 2.0.28

Bumps [sqlalchemy](https://github.com/sqlalchemy/sqlalchemy) from 1.3.22 to 2.0.28.
- [Release notes](https://github.com/sqlalchemy/sqlalchemy/releases)
- [Changelog](https://github.com/sqlalchemy/sqlalchemy/blob/main/CHANGES.rst)
- [Commits](https://github.com/sqlalchemy/sqlalchemy/commits)

---
updated-dependencies:
- dependency-name: sqlalchemy
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -11,5 +11,5 @@ github3-utils>=0.6.1
 gunicorn>=20.0.4
 psycopg2-binary>=2.8.6
 southwark>=0.7.1
-sqlalchemy==1.3.22
+sqlalchemy==2.0.28
 werkzeug<3