Update index.md

Author: chaimburstein

arise-source/posts/how I learned to code/index.md

@@ -4,7 +4,7 @@ Title:: "How to Code"
 Author:: "Chaim Burstein"
 Description:: "My Coding Journey"
 Language:: "en"
-Thumbnail:: "thumbnail.png"
+Thumbnail:: ""
 Published Date:: "2025-07-25"
 Modified Date:: "2025-07-25"