Add config for default branch name (#171)

Co-authored-by: Thomas Miceli <27960254+thomiceli@users.noreply.github.com>

docs/installation.md

@@ -59,7 +59,7 @@ chmod +x opengist
 ## From source
 
 Requirements : 
-* [Git](https://git-scm.com/downloads) (2.20+)
+* [Git](https://git-scm.com/downloads) (2.28+)
 * [Go](https://go.dev/doc/install) (1.20+)
 * [Node.js](https://nodejs.org/en/download/) (16+)