[chronojump] Added missing image

[Xavier de Blas <xaviblas src gnome org>]

commit 5896d8f05f607f5a6d8d630ea69e3cd6eab9618f
Author: Xavier de Blas <xaviblas gmail com>
Date:   Mon Aug 30 03:46:57 2021 +0200

    Added missing image

 images/md/image_group_outline.png | Bin 0 -> 5008 bytes
 1 file changed, 0 insertions(+), 0 deletions(-)
---
diff --git a/images/md/image_group_outline.png b/images/md/image_group_outline.png
new file mode 100644
index 000000000..a74cad76c
Binary files /dev/null and b/images/md/image_group_outline.png differ