fix(deps): update dependency @vercel/og to ^0.0.20 (#1768)

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

Author: renovate[bot]

demos/default/package.json

@@ -20,7 +20,7 @@
   "dependencies": {
     "@reach/dialog": "^0.16.2",
     "@reach/visually-hidden": "^0.16.0",
-    "@vercel/og": "^0.0.15",
+    "@vercel/og": "^0.0.20",
     "next": "^13.0.0",
     "react": "^18.0.0",
     "react-dom": "^18.0.0"