chore(deps): bump alembic from 1.16.1 to 1.18.4 (#20)

Bumps [alembic](https://github.com/sqlalchemy/alembic) from 1.16.1 to 1.18.4.
- [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-version: 1.18.4
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -1,5 +1,5 @@
 aiogram==3.26.0
-alembic==1.16.1
+alembic==1.18.4
 asyncpg==0.31.0
 cryptography==46.0.5
 eth-account==0.13.7