chore(deps): bump alembic from 1.18.3 to 1.18.4 in /discord (#5245)

Bumps [alembic](https://github.com/sqlalchemy/alembic) from 1.18.3 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-patch
...

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

Author: dependabot[bot]

discord/poetry.lock

@@ -10,7 +10,7 @@ python = "^3.11"
 discord-py = "^2.6.4"
 sqlalchemy = {extras = ["postgresql-asyncpg"], version = "^2.0.46"}
 aiohttp-jinja2 = "^1.6"
-alembic = "^1.18.3"
+alembic = "^1.18.4"
 
 
 [tool.poetry.group.dev.dependencies]