chore: Bump vulnerable deps (#33915)

* Consolidate different versions of postcss. Remove @mertasan/tailwindcss-variables from ui package.

* Bump vitest in pg-meta to remove a vulnerable version of vite.

* Bump dompurify.

* Bump all octokit deps to solve 2 vulns.

* Fix warnings about destructuring json imports.

* Remove a console.log in docs.

* Fix the changelog page to use an ESM import.

* Stabilize the generate-sitemap script output.

* Try another fix for the changelog.

packages/ui/package.json

@@ -19,7 +19,6 @@
   "dependencies": {
     "@headlessui/react": "^1.7.17",
     "@hookform/resolvers": "^3.1.1",
-    "@mertasan/tailwindcss-variables": "^2.2.3",
     "@radix-ui/react-accordion": "^1.1.2",
     "@radix-ui/react-alert-dialog": "^1.0.5",
     "@radix-ui/react-aspect-ratio": "^1.0.3",