Update dependency tailwindcss to v4 (#60)

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

Author: renovate[bot]

docs-support/package.json

@@ -66,7 +66,7 @@
     "package-up": "^5.0.0",
     "read-package-up": "^11.0.0",
     "should-handle-link": "^1.2.2",
-    "tailwindcss": "^3.4.14"
+    "tailwindcss": "^4.0.0"
   },
   "devDependencies": {
     "@babel/core": "^7.24.4",