Bump vulture from 2.14 to 2.15

Bumps [vulture](https://github.com/jendrikseipp/vulture) from 2.14 to 2.15.
- [Release notes](https://github.com/jendrikseipp/vulture/releases)
- [Changelog](https://github.com/jendrikseipp/vulture/blob/main/CHANGELOG.md)
- [Commits](jendrikseipp/vulture@v2.14...v2.15)

---
updated-dependencies:
- dependency-name: vulture
  dependency-version: '2.15'
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pyproject.toml

@@ -103,7 +103,7 @@ optional-dependencies.dev = [
     "types-pyyaml==6.0.12.20250915",
     "types-requests==2.32.4.20260107",
     "urllib3==2.6.3",
-    "vulture==2.14",
+    "vulture==2.15",
     "vws-python==2026.2.25.1",
     "vws-test-fixtures==2023.3.5",
     "vws-web-tools==2026.2.22.1",