Bump sqlalchemy from 2.0.20 to 2.0.21

Bumps [sqlalchemy](https://github.com/sqlalchemy/sqlalchemy) from 2.0.20 to 2.0.21.
- [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-patch
...

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

requirements.txt

@@ -25,7 +25,7 @@ python-dateutil==2.8.2
 pytz==2023.3
 requests==2.31.0
 six==1.16.0
-SQLAlchemy==2.0.20
+SQLAlchemy==2.0.21
 typing_extensions==4.7.1
 tzlocal==5.0.1
 urllib3==2.0.4