build(deps): update ruff requirement from <0.8.3 to <0.8.4 (#110)

Updates the requirements on [ruff](https://github.com/astral-sh/ruff) to permit the latest version.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@v0.0.18...0.8.3)

---
updated-dependencies:
- dependency-name: ruff
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pyproject.toml

@@ -24,7 +24,7 @@ doc = ["pdoc >= 14.2,< 16.0"]
 lint = [
     # NOTE: ruff is under active development, so we pin conservatively here
     # and let Dependabot periodically perform this update.
-    "ruff < 0.8.3",
+    "ruff < 0.8.4",
     "mypy >= 1.0",
 ]
 codegen = ["datamodel-code-generator>=0.25.2", "sigstore-rekor-types[lint]"]