fix(deps): downgrade rehype-pretty-code to 0.9.11

WARN  Issues with peer dependencies found
rehype-pretty-code 0.14.3
✕ unmet peer shiki@"^1.0.0 || ^2.0.0 || ^3.0.0 || ^4.0.0": found 0.14.7

Author: Maxcastel

pwa/package.json

@@ -44,7 +44,7 @@
     "react": "18.3.1",
     "react-dom": "18.3.1",
     "rehype-autolink-headings": "^6.1.1",
-    "rehype-pretty-code": "^0.14.3",
+    "rehype-pretty-code": "^0.9.11",
     "rehype-slug": "^5.1.0",
     "remark-frontmatter": "^4.0.1",
     "remark-mdx-frontmatter": "^3.0.0",