Build(deps): Bump idna from 3.4 to 3.6 in /dependencies/docs

Bumps [idna](https://github.com/kjd/idna) from 3.4 to 3.6.
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.rst)
- [Commits](kjd/idna@v3.4...v3.6)

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

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

dependencies/docs/constraints.txt

@@ -3,7 +3,7 @@ Babel==2.13.1
 certifi==2023.11.17
 charset-normalizer==3.3.2
 docutils==0.18.1
-idna==3.4
+idna==3.6
 imagesize==1.4.1
 Jinja2==3.1.2
 MarkupSafe==2.1.3