build(deps): bump idna from 2.10 to 3.7 in /docs

Bumps [idna](https://github.com/kjd/idna) from 2.10 to 3.7.
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.rst)
- [Commits](kjd/idna@v2.10...v3.7)

---
updated-dependencies:
- dependency-name: idna
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Diff for: docs/requirements.txt

@@ -1,7 +1,7 @@
 alabaster==0.7.13
 babel==2.15.0
 certifi==2024.2.2
-idna==2.10
+idna==3.7
 imagesize==1.4.1
 jsonpointer==2.4
 pyparsing==2.4.7