adding video id

Author: shiffman

content/videos/challenges/181-image-stippling/index.json

@@ -2,7 +2,7 @@
   "title": "Weighted Voronoi Stippling",
   "videoNumber": "181",
   "description": "TBD",
-  "videoId": "TBD",
+  "videoId": "Bxdt6T_1qgc",
   "nebulaSlug": "codingtrain-coding-challenge-181-image-stippling",
   "date": "2024-02-22",
   "languages": ["p5.js", "JavaScript"],