Revert Shiki version changes

Author: philipp-spiess

package.json

@@ -14,7 +14,7 @@
     "@headlessui/react": "0.0.0-insiders.b6f355d1",
     "@heroicons/react": "^2.2.0",
     "@next/mdx": "15.3.0-canary.23",
-    "@shikijs/transformers": "^3.2.1",
+    "@shikijs/transformers": "^1.29.1",
     "@tailwindcss/postcss": "^4.0.17",
     "@types/mdx": "^2.0.13",
     "clsx": "^2.1.1",
@@ -27,7 +27,7 @@
     "open-graph-scraper-lite": "^2.1.0",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
-    "shiki": "^3.2.1",
+    "shiki": "^1.29.1",
     "tailwindcss": "^4.0.17"
   },
   "devDependencies": {