[simple-scan] Use git, not bzr

[Robert Ancell <rancell src gnome org>]

commit 05d5508d9726c6b630a68220eee41d63f7b290d5
Author: Robert Ancell <robert ancell canonical com>
Date:   Thu Dec 7 09:58:49 2017 +1300

    Use git, not bzr

 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/README.md b/README.md
index 88f3e97..ac6b51c 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ using the [SANE](http://sane-project.org/) scanning libraries.
 
 Install the dependencies (on Ubuntu/Debian):
 ```
-$ sudo apt install bzr meson valac libgtk-3-dev libgusb-dev libcolord-dev libpackagekit-glib2-dev 
libwebp-dev libsane-dev gettext itstool
+$ sudo apt install git meson valac libgtk-3-dev libgusb-dev libcolord-dev libpackagekit-glib2-dev 
libwebp-dev libsane-dev gettext itstool
 ```
 
 Get the source: