Update cyclonedx-python-lib[validation] requirement

Updates the requirements on [cyclonedx-python-lib[validation]](https://github.com/CycloneDX/cyclonedx-python-lib) to permit the latest version.
- [Release notes](https://github.com/CycloneDX/cyclonedx-python-lib/releases)
- [Changelog](https://github.com/CycloneDX/cyclonedx-python-lib/blob/main/CHANGELOG.md)
- [Commits](CycloneDX/cyclonedx-python-lib@v8.5.0...v9.1.0)

---
updated-dependencies:
- dependency-name: cyclonedx-python-lib[validation]
  dependency-version: 9.1.0
  dependency-type: direct:production
...

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Author: dependabot[bot]

pyproject.toml

@@ -95,7 +95,7 @@ classifiers = [
 dependencies = [
     "boltons ~= 25.0.0",
     "click-extra ~= 4.15.0",
-    "cyclonedx-python-lib [validation] ~= 8.5.0",
+    "cyclonedx-python-lib [validation] ~= 9.1.0",
     "extra-platforms [pytest] ~= 2.1.0",
     "more-itertools ~= 10.6.0",
     "packageurl-python ~= 0.16.0",