build(deps): bump sphinx-multiversion-scylla in /docs

Bumps [sphinx-multiversion-scylla](https://holzhaus.github.io/sphinx-multiversion/) from 0.3.7 to 0.3.8.

---
updated-dependencies:
- dependency-name: sphinx-multiversion-scylla
  dependency-version: 0.3.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

docs/pyproject.toml

@@ -9,7 +9,7 @@ dependencies = [
     "myst-parser>=5.0.0",
     "sphinx-autobuild>=2025.4.8",
     "sphinx>=9.0",
-    "sphinx-multiversion-scylla>=0.3.7",
+    "sphinx-multiversion-scylla>=0.3.8",
     "sphinx-sitemap>=2.9.0",
     "redirects_cli>=0.1.3",
     "wheel>=0.45.0",