Bump sqlfluff from 3.3.0 to 3.3.1 in /src (#4042)

Bumps [sqlfluff](https://github.com/sqlfluff/sqlfluff) from 3.3.0 to 3.3.1.
- [Release notes](https://github.com/sqlfluff/sqlfluff/releases)
- [Changelog](https://github.com/sqlfluff/sqlfluff/blob/main/CHANGELOG.md)
- [Commits](sqlfluff/sqlfluff@3.3.0...3.3.1)

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

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

Author: dependabot[bot]

src/requirements.txt

@@ -4,7 +4,7 @@ gunicorn==22.0.0
 pytest==8.2.2
 pytest-watch==4.2.0
 pytest-cov==6.0.0
-sqlfluff==3.3.0
+sqlfluff==3.3.1
 
 # sql/util/* dependencies
 pandas==2.2.3