add nebula slug

Author: shiffman

content/videos/challenges/187-bayesian-text-classification/index.json

@@ -4,6 +4,7 @@
   "videoNumber": "187",
   "videoId": "g3-PXyF8U70",
   "date": "2025-10-11",
+  "nebulaSlug": "codingtrain-coding-challenge-187-bayes-classifier",
   "languages": ["JavaScript", "p5.js"],
   "topics": [
     "Bayes theorem",