Bump gunicorn from 19.7.1 to 19.8.1
Bump gunicorn from 19.7.1 to 19.8.1

Bumps [gunicorn](https://github.com/benoitc/gunicorn) from 19.7.1 to 19.8.1.
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](https://github.com/benoitc/gunicorn/compare/19.7.1...19.8.1)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
gpodder/mygpo-auth,gpodder/mygpo-auth