deps(python): bump sqlfluff from 3.0.3 to 3.0.4 in /dependencies/python

Bumps [sqlfluff](https://github.com/sqlfluff/sqlfluff) from 3.0.3 to 3.0.4.
- [Release notes](https://github.com/sqlfluff/sqlfluff/releases)
- [Changelog](https://github.com/sqlfluff/sqlfluff/blob/main/CHANGELOG.md)
- [Commits](sqlfluff/sqlfluff@3.0.3...3.0.4)

---
updated-dependencies:
- dependency-name: sqlfluff
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

dependencies/python/sqlfluff.txt

@@ -1 +1 @@
-sqlfluff==3.0.3
+sqlfluff==3.0.4