Bump python from 3.9.0-slim to 3.9.1-slim
Bump python from 3.9.0-slim to 3.9.1-slim

Bumps python from 3.9.0-slim to 3.9.1-slim.

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
mozilla-services/kinto-dist,mozilla-services/kinto-dist