Update webauthn requirement from ==2.7.* to ==2.8.* (#6293)

Updates the requirements on [webauthn](https://github.com/duo-labs/py_webauthn) to permit the latest version.
- [Release notes](https://github.com/duo-labs/py_webauthn/releases)
- [Changelog](https://github.com/duo-labs/py_webauthn/blob/master/CHANGELOG.md)
- [Commits](https://github.com/duo-labs/py_webauthn/compare/v2.7.0...v2.8.0)

---
updated-dependencies:
- dependency-name: webauthn
  dependency-version: 2.8.0
  dependency-type: direct:production
...

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pyproject.toml

@@ -101,7 +101,7 @@ dependencies = [
   "tqdm==4.*",
   "ua-parser==1.0.*",
   "vobject==0.9.*",
-  "webauthn==2.7.*",
+  "webauthn==2.8.*",
   "zeep==4.3.*"
 ]