[readme] Add badges to repo README

Adds a couple helpful badges to the top-level README. In particular,
adds a python version badge showing our minimum supported version.

Signed-off-by: Jake Hunsaker <[email protected]>

README.md

@@ -1,5 +1,4 @@
-[![Build Status](https://api.cirrus-ci.com/github/sosreport/sos.svg?branch=main)](https://cirrus-ci.com/github/sosreport/sos) [![Documentation Status](https://readthedocs.org/projects/sos/badge/?version=main)](https://sos.readthedocs.io/en/main/?badge=main) [![sosreport](https://snapcraft.io/sosreport/badge.svg)](https://snapcraft.io/sosreport)
-
+[![Build Status](https://api.cirrus-ci.com/github/sosreport/sos.svg?branch=main)](https://cirrus-ci.com/github/sosreport/sos) [![Documentation Status](https://readthedocs.org/projects/sos/badge/?version=main)](https://sos.readthedocs.io/en/main/?badge=main) [![](https://img.shields.io/badge/python-3.8+-blue.svg)](https://www.python.org/downloads/) [![sosreport](https://snapcraft.io/sosreport/badge.svg)](https://snapcraft.io/sosreport) [![Fedora package](https://img.shields.io/fedora/v/sos?color=darkgreen)](https://packages.fedoraproject.org/pkgs/sos/sos/) [![Ubuntu Package Version](https://img.shields.io/ubuntu/v/sosreport?color=darkgreen)](https://launchpad.net/ubuntu/+source/sosreport) [![Debian package (for distribution)](https://img.shields.io/debian/v/sosreport/unstable?color=darkgreen)](https://packages.debian.org/unstable/sosreport) ![GitHub contributors](https://img.shields.io/github/contributors/sosreport/sos)
 
 # SoS