Mention Zorin OS as a Debian based distro

Author: AdityaGarg8

mkdocs.yml

@@ -118,7 +118,7 @@ nav:
                 - Home: distributions/ubuntu/home.md
                 - FAQ: distributions/ubuntu/faq.md
                 - Installation: distributions/ubuntu/installation.md
-          - Debian, Pop!_OS and other similar distros:
+          - Debian, Pop!_OS, Zorin OS and other similar distros:
                 - Installation: distributions/debian/installation.md
 
 extra_css: