build(deps): bump idna from 2.10 to 3.4 in /docs (#2499)

Bumps [idna](https://github.com/kjd/idna) from 2.10 to 3.4.
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.rst)
- [Commits](kjd/idna@v2.10...v3.4)

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

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

docs/requirements.txt

@@ -4,7 +4,7 @@ certifi==2022.12.7
 chardet==4.0.0
 commonmark==0.9.1
 docutils==0.16
-idna==2.10
+idna==3.4
 imagesize==1.2.0
 Jinja2==2.11.3
 MarkupSafe==1.1.1