chore(deps-dev): bump furo from 2021.6.24b37 to 2021.7.5b38

Bumps [furo](/~https://github.com/pradyunsg/furo) from 2021.6.24b37 to 2021.7.5b38.
- [Release notes](/~https://github.com/pradyunsg/furo/releases)
- [Changelog](/~https://github.com/pradyunsg/furo/blob/main/docs/changelog.md)
- [Commits](pradyunsg/furo@2021.06.24.beta37...2021.07.05.beta38)

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

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

pyproject.toml

@@ -67,7 +67,7 @@ black = "^20.8b1"
 flake8-black = "^0.2.1"
 safety = "^1.10.3"
 Sphinx = "^4.0.2"
-furo = "^2021.6.24b37"
+furo = "^2021.7.5b38"
 sphinx-argparse = "^0.2.5"
 coverage = {version = "^5.5", extras = ["toml"]}
 pygments = "^2.9.0"