build(deps): bump alembic from 1.13.2 to 1.13.3 in /backend

Bumps [alembic](https://github.com/sqlalchemy/alembic) from 1.13.2 to 1.13.3.
- [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] <support@github.com>

backend/pyproject.toml

@@ -23,7 +23,7 @@ classifiers = [
 ]
 dependencies = [
   "PyYAML",
-  "alembic==1.13.2",
+  "alembic==1.13.3",
   "appdirs",
   "cachetools",
   "email-validator",