docs: roll back rehype (#7348)

Author: Shane-Donlon

packages/docs/package.json

@@ -43,8 +43,8 @@
     "qwik-image": "0.0.10",
     "react": "18.3.1",
     "react-dom": "18.3.1",
-    "rehype-pretty-code": "0.14.0",
-    "shiki": "1.29.2",
+    "rehype-pretty-code": "0.11.0",
+    "shiki": "0.14.7",
     "snarkdown": "2.0.0",
     "tailwindcss": "3.4.6",
     "terser": "5.31.3",