[gnome-tweaks] Call out nautilus 3.26 as optional

[Jeremy Bicha <jbicha src gnome org>]

commit ba79a26a2712bc7cc38b1ad47e36132126c9d669
Author: Simon McVittie <smcv debian org>
Date:   Wed Mar 7 14:12:54 2018 +0000

    Call out nautilus 3.26 as optional
    
    As requested on !5.

 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/README.md b/README.md
index 0577cd0..43121cc 100644
--- a/README.md
+++ b/README.md
@@ -28,10 +28,10 @@ RUNTIME DEPENDENCIES
   - gsettings-desktop-schemas (>= 3.27.90)
   - gnome-shell (>= 3.24)
   - mutter
-  - nautilus
 
 * Optional:
    - gnome-software (for links from GNOME Shell Extensions page)
+   - nautilus 3.26 or older (for icons on the desktop)
 
 RUNNING
 -------