Bump idna from 3.4 to 3.7 in /analytics-api

Bumps [idna](https://github.com/kjd/idna) from 3.4 to 3.7.
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.rst)
- [Commits](kjd/idna@v3.4...v3.7)

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

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

analytics-api/requirements.txt

@@ -26,7 +26,7 @@ flask-jwt-oidc==0.3.0
 flask-marshmallow==1.0.0
 flask-restx==1.1.0
 gunicorn==20.1.0
-idna==3.4
+idna==3.7
 importlib-metadata==6.3.0
 importlib-resources==5.12.0
 itsdangerous==2.0.1