Bump sqlalchemy from 1.4.41 to 2.0.21

Bumps [sqlalchemy](https://github.com/sqlalchemy/sqlalchemy) from 1.4.41 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-major
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,4 +1,4 @@
-sqlalchemy==1.4.41
+sqlalchemy==2.0.21
 flask==1.1.2
 passlib==1.7.4
 pymysql==1.1.0