Bump sass in /src/sphinx_antsibull_ext/css in the npm group (#379)

Bumps the npm group in /src/sphinx_antsibull_ext/css with 1 update: [sass](https://github.com/sass/dart-sass).


Updates `sass` from 1.85.0 to 1.85.1
- [Release notes](https://github.com/sass/dart-sass/releases)
- [Changelog](https://github.com/sass/dart-sass/blob/main/CHANGELOG.md)
- [Commits](sass/dart-sass@1.85.0...1.85.1)

---
updated-dependencies:
- dependency-name: sass
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: npm
...

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

Author: dependabot[bot]

src/sphinx_antsibull_ext/css/package-lock.json

@@ -4,6 +4,6 @@
     "cssnano": "^7.0.6",
     "postcss": "^8.5.3",
     "postcss-cli": "^11.0.0",
-    "sass": "^1.85.0"
+    "sass": "^1.85.1"
   }
 }