Bump whitenoise from 6.8.2 to 6.9.0

Bumps [whitenoise](https://github.com/evansd/whitenoise) from 6.8.2 to 6.9.0.
- [Changelog](https://github.com/evansd/whitenoise/blob/main/docs/changelog.rst)
- [Commits](evansd/whitenoise@6.8.2...6.9.0)

Author: dependabot[bot]

poetry.lock

@@ -25,7 +25,7 @@ pymdown-extensions = "10.14.3"
 python-frontmatter = "1.1.0"
 pyyaml = "6.0.2"
 sentry-sdk = "2.20.0"
-whitenoise = "6.8.2"
+whitenoise = "6.9.0"
 
 [tool.poetry.group.dev.dependencies]
 python-dotenv = "1.0.1"