Added new contribution

Author: JosGielen

content/videos/challenges/181-image-stippling/showcase/contribution-1709986054.jpg

@@ -0,0 +1,10 @@
+{
+  "title": "Weighted Voronoi Stippling in C#",
+  "author": {
+    "name": "Jos Gielen",
+    "url": "https://github.com/JosGielen"
+  },
+  "url": "http://www.josgielen.elementfx.com/CC181/Voronoi_Stippling.html",
+  "submittedOn": "2024-03-09T12:07:34.412Z",
+  "socialPermission": true
+}