fix: update example file paths to use relative paths

Author: Verdenroz

docs/javascripts/playground-ui.js

@@ -5,19 +5,19 @@
  * match the Rust implementation.
  */
 
-// Example files to load (absolute paths from site root)
+// Example files to load (relative paths)
 const EXAMPLES = {
   'toon': {
     name: 'Hiking Data (Rows wins)',
-    file: '/data/toon.json',
+    file: '../data/toon.json',
   },
   'quote': {
     name: 'Stock Quote (Columns wins)',
-    file: '/data/quote.json',
+    file: '../data/quote.json',
   },
   'gainers': {
     name: 'Market Gainers (Struct wins)',
-    file: '/data/gainers.json',
+    file: '../data/gainers.json',
   },
 };