[gnome-klotski] Add missing https.

[Arnaud B. <arnaudb src gnome org>]

commit 54edc296b18c360a519b6ba4ee46b805b9614d40
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Tue Oct 15 15:01:28 2019 +0200

    Add missing https.

 data/assets.svg | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/data/assets.svg b/data/assets.svg
index c99d55c..625ec34 100755
--- a/data/assets.svg
+++ b/data/assets.svg
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd";>
-<svg xmlns="http://www.w3.org/2000/svg"; xmlns:xlink="http://www.w3.org/1999/xlink"; width="918" height="68" 
viewBox="0 0 918 68">
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "https://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd";>
+<svg xmlns="https://www.w3.org/2000/svg"; xmlns:xlink="https://www.w3.org/1999/xlink"; width="918" height="68" 
viewBox="0 0 918 68">
  <defs>
   <filter id="shadow" filterUnits="userSpaceOnUse" x="0" y="10" width="894" height="48">
    <feGaussianBlur in="SourceAlpha" stdDeviation="1.4"/>