Bump furo from 2024.4.27 to 2024.5.6 in /core

Bumps [furo](https://github.com/pradyunsg/furo) from 2024.4.27 to 2024.5.6.
- [Release notes](https://github.com/pradyunsg/furo/releases)
- [Changelog](https://github.com/pradyunsg/furo/blob/main/docs/changelog.md)
- [Commits](https://github.com/pradyunsg/furo/compare/2024.04.27...2024.05.06)

---
updated-dependencies:
- dependency-name: furo
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

core/pyproject.toml

@@ -80,7 +80,7 @@ dev = [
     "typing-extensions == 4.9.0 ; python_version < '3.10'",
 ]
 docs = [
-    "furo == 2024.4.27",
+    "furo == 2024.5.6",
     "Pillow == 10.3.0",
     "pyenchant == 3.2.2",
     # Sphinx 7.2 deprecated support for Python 3.8