Mention that in Fedora you can now install scancode from Fedora repository

See https://bodhi.fedoraproject.org/updates/?packages=scancode-toolkit

Author: xsuchy

README.rst

@@ -161,6 +161,8 @@ There are a few common ways to `install ScanCode <https://scancode-toolkit.readt
 - `Run in a Docker container with a git clone and "docker run"
   <https://scancode-toolkit.readthedocs.io/en/latest/getting-started/install.html#installation-via-docker>`_
 
+- In Fedora 40+ you can `dnf install scancode-toolkit`
+
 
 Quick Start
 ===========
@@ -258,4 +260,4 @@ the third-party code used in ScanCode for more details.
 
 .. |release-github-actions| image:: https://github.com/nexB/scancode-toolkit/actions/workflows/scancode-release.yml/badge.svg?event=push
     :target: https://github.com/nexB/scancode-toolkit/actions/workflows/scancode-release.yml
-    :alt: Release tests
+    :alt: Release tests