Bump idna from 3.7 to 3.10 in /backend

Bumps [idna](https://github.com/kjd/idna) from 3.7 to 3.10.
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.rst)
- [Commits](kjd/idna@v3.7...v3.10)

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

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

Author: dependabot[bot]

backend/pyproject.toml

@@ -50,7 +50,7 @@ dependencies = [
     "django-timezone-field==7.0",
     "certifi==2024.7.4",
     "chardet==5.2.0",
-    "idna==3.7",
+    "idna==3.10",
     "requests==2.32.3",
     "urllib3==2.2.2",
     "aniso8601==9.0.1",