Draft: Add badge for OpenSSF best practices
Overview
Adds the OpenSSF best practices badge for Exosphere.
It links to this project: https://bestpractices.coreinfrastructure.org/en/projects/7368
Partial fix for #822 (closed)
How to Test
https://gitlab.com/exosphere/exosphere/-/blob/abc291f62189699ad3ec37296aeffb92c6037273/README.md
Ensure the badge shows up in the README.md file, like so:
Edited by Julian Pistorius