Bump idna from 3.7 to 3.15

Bumps [idna](https://github.com/kjd/idna) from 3.7 to 3.15.
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.md)
- [Commits](kjd/idna@v3.7...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

@@ -12,7 +12,7 @@ h11==0.16.0
 httpcore==0.16.3
 httptools==0.5.0
 httpx==0.23.3
-idna==3.7
+idna==3.15
 itsdangerous==2.1.2
 Jinja2==3.1.6
 MarkupSafe==2.1.2