Bump sybil from 9.2.0 to 9.3.0

Bumps [sybil](https://github.com/simplistix/sybil) from 9.2.0 to 9.3.0.
- [Changelog](https://github.com/simplistix/sybil/blob/master/CHANGELOG.rst)
- [Commits](simplistix/sybil@9.2.0...9.3.0)

---
updated-dependencies:
- dependency-name: sybil
  dependency-version: 9.3.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pyproject.toml

@@ -71,7 +71,7 @@ optional-dependencies.dev = [
     "sphinx-pyproject==0.3.0",
     "sphinx-substitution-extensions==2025.11.17",
     "sphinxcontrib-spelling==8.0.2",
-    "sybil==9.2.0",
+    "sybil==9.3.0",
     "types-requests==2.32.4.20250913",
     "vulture==2.14",
     "vws-python-mock==2025.3.10.1",