Bump sqlfluff from 1.4.1 to 1.4.2 in /src (#3279)

Bumps [sqlfluff](https://github.com/sqlfluff/sqlfluff) from 1.4.1 to 1.4.2.
- [Release notes](https://github.com/sqlfluff/sqlfluff/releases)
- [Changelog](https://github.com/sqlfluff/sqlfluff/blob/main/CHANGELOG.md)
- [Commits](sqlfluff/sqlfluff@1.4.1...1.4.2)

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

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

Author: dependabot[bot]

src/requirements.txt

@@ -4,4 +4,4 @@ gunicorn==20.1.0
 pytest==7.2.0
 pytest-watch==4.2.0
 pytest-cov==4.0.0
-sqlfluff==1.4.1
+sqlfluff==1.4.2