bump sqlfluff in CI

Author: alistairewj

.github/workflows/lint_sqlfluff.yml

@@ -14,7 +14,7 @@ jobs:
         with:
           python-version: "3.12"
       - name: install sqlfluff
-        run: "pip install sqlfluff==3.5.0"
+        run: "pip install sqlfluff==4.1.0"
       - name: Get changed files
         id: get_file_changes
         uses: trilom/file-changes-action@v1.2.4