[gnome-backgrounds] defaults: fix color banding

[Jakub Steiner <jimmac src gnome org>]

commit 4184d91b32aad42c2604c5844ef6bcddc622c7aa
Author: Jakub Steiner <jimmac gmail com>
Date:   Thu May 23 23:11:41 2019 +0200

    defaults: fix color banding
    
    - avoid color banding by using HPJ's amazing dither gegl op
    - 8times larger filesize, oops
    - might have gone for pngs at half the size. we'll see

 backgrounds/adwaita-day.jpg     | Bin 318409 -> 2128181 bytes
 backgrounds/adwaita-morning.jpg | Bin 329684 -> 2127910 bytes
 backgrounds/adwaita-night.jpg   | Bin 235983 -> 2026372 bytes
 3 files changed, 0 insertions(+), 0 deletions(-)
---
diff --git a/backgrounds/adwaita-day.jpg b/backgrounds/adwaita-day.jpg
index acb1d17..7905208 100644
Binary files a/backgrounds/adwaita-day.jpg and b/backgrounds/adwaita-day.jpg differ
diff --git a/backgrounds/adwaita-morning.jpg b/backgrounds/adwaita-morning.jpg
index 40e94f7..690e0f5 100644
Binary files a/backgrounds/adwaita-morning.jpg and b/backgrounds/adwaita-morning.jpg differ
diff --git a/backgrounds/adwaita-night.jpg b/backgrounds/adwaita-night.jpg
index 56bf687..1ecaf8f 100644
Binary files a/backgrounds/adwaita-night.jpg and b/backgrounds/adwaita-night.jpg differ