Chore(deps-dev): Update pyproject-fmt requirement from <2.6 to <2.9

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/2.8.0)

---
updated-dependencies:
- dependency-name: pyproject-fmt
  dependency-version: 2.8.0
  dependency-type: direct:development
...

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

Author: dependabot[bot]

pyproject.toml

@@ -94,7 +94,7 @@ optional-dependencies.develop = [
   "munch<5",
   "mypy<1.20",
   "poethepoet<0.30",
-  "pyproject-fmt<2.6",
+  "pyproject-fmt<2.9",
   "ruff<0.15",
   "types-tabulate",
 ]