Update pyproject-fmt requirement in /cratedb_sqlparse_py

Updates the requirements on [pyproject-fmt](https://github.com/tox-dev/toml-fmt) to permit the latest version.
- [Release notes](https://github.com/tox-dev/toml-fmt/releases)
- [Commits](tox-dev/toml-fmt@pyproject-fmt/2.4.0...pyproject-fmt/2.6.0)

---
updated-dependencies:
- dependency-name: pyproject-fmt
  dependency-version: 2.6.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

cratedb_sqlparse_py/pyproject.toml

@@ -69,7 +69,7 @@ dev = [
   "mypy<1.18",
   "packaging",
   "poethepoet<1",
-  "pyproject-fmt<2.6",
+  "pyproject-fmt<2.7",
   "pytest<9",
   "pytest-cov<7",
   "ruff<0.13",