Bump alembic from 1.14.1 to 1.15.2

Bumps [alembic](https://github.com/sqlalchemy/alembic) from 1.14.1 to 1.15.2.
- [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] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -15,7 +15,7 @@ git+https://github.com/cemathey/python-discord-webhook@89ae25140b30a6747de70e5bf
 requests==2.32.3
 steam==1.4.4
 # Alembic does not use semantic versioning, so be careful with the version numbers https://alembic.sqlalchemy.org/en/latest/front.html#versioning-scheme
-alembic==1.14.1
+alembic==1.15.2
 rq==2.1.0
 rq-scheduler==0.14.0
 paramiko==3.5.1