Bump idna from 3.8 to 3.15

Bumps [idna](https://github.com/kjd/idna) from 3.8 to 3.15.
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.md)
- [Commits](kjd/idna@v3.8...v3.15)

---
updated-dependencies:
- dependency-name: idna
  dependency-version: '3.15'
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -2,7 +2,7 @@ certifi==2024.8.30
 chardet==5.2.0
 cycler==0.12.1
 Cython==3.0.11
-idna==3.8
+idna==3.15
 kiwisolver==1.4.5
 lxml==5.3.0
 matplotlib==3.9.2