Bump sqlfluff from 2.1.2 to 2.1.3

Bumps [sqlfluff](https://github.com/sqlfluff/sqlfluff) from 2.1.2 to 2.1.3.
- [Release notes](https://github.com/sqlfluff/sqlfluff/releases)
- [Changelog](https://github.com/sqlfluff/sqlfluff/blob/main/CHANGELOG.md)
- [Commits](sqlfluff/sqlfluff@2.1.2...2.1.3)

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

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

requirements.txt

@@ -1,4 +1,4 @@
-sqlfluff==2.1.2
+sqlfluff==2.1.3
 Flask==2.3.2
 Flask_Limiter==3.3.1
 flask-talisman==1.0.0