fix(deps): update dependency @uiw/react-markdown-preview-example to v2 (#597)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

www/package.json

@@ -22,7 +22,7 @@
     "source-map-explorer": "~2.5.3"
   },
   "dependencies": {
-    "@uiw/react-markdown-preview-example": "^1.5.6",
+    "@uiw/react-markdown-preview-example": "^2.0.0",
     "@uiw/react-md-editor": "4.0.0",
     "dom-to-image": "^2.6.0",
     "katex": "~0.16.0",