python: bump ruff from 0.15.17 to 0.15.18 in /python/railjson_generator

Bumps [ruff](https://github.com/astral-sh/ruff) from 0.15.17 to 0.15.18.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.15.17...0.15.18)

---
updated-dependencies:
- dependency-name: ruff
  dependency-version: 0.15.18
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

python/railjson_generator/pyproject.toml

@@ -12,7 +12,7 @@ check = [
   "pyright~=1.1.410",
   "pytest-cov~=7.1.0",
   "pytest~=9.1.1",
-  "ruff~=0.15.17",
+  "ruff~=0.15.18",
 ]
 
 [tool.pyright]