Added Gerbil client

Added Gerbil client to list

README.md

@@ -71,6 +71,7 @@ Repo mirrors:
 - [Castor](https://git.sr.ht/~julienxx/castor) (Rust) - graphical Gemini client using GTK.
 - [Fafi](https://git.sr.ht/~soapdog/fafi-browser) (Racket) - graphical Gemini browser written in Racket.
 - [Fossil](https://github.com/koyuspace/fossil) (Vala) - GTK3 Gemini browser written in Vala for desktop and mobile.
+- [Gerbil](https://gitlab.com/armen138/gerbil) (Python) - Gemini and Spartan browser written in python with GTK and LibHandy for desktop and mobile
 - [Lagrange](https://git.skyjake.fi/skyjake/lagrange) (C) - desktop GUI client with inline image viewing, multiple tabs, bookmarks and more.
 - [Moonlander](https://sr.ht/~admicos/moonlander/) (Rust) - the fanciest Gemini client in the entire solar system.
 - [Kristall](https://github.com/MasterQ32/kristall) (C++) - graphical Gopher and Gemini client using QT.