Bump idna from 3.7 to 3.8 (#179)

Bumps [idna](https://github.com/kjd/idna) from 3.7 to 3.8.
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.rst)
- [Commits](kjd/idna@v3.7...v3.8)

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

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

sphinx/requirements.txt

@@ -5,7 +5,7 @@ beautifulsoup4==4.12.2
 certifi==2023.11.17
 charset-normalizer==3.3.2
 docutils==0.20.1
-idna==3.7
+idna==3.8
 imagesize==1.4.1
 importlib-metadata==8.2.0
 Jinja2==3.1.4