chore(deps): update dependency @astrojs/tailwind to v6

Author: renovate[bot]

web/package.json

@@ -9,7 +9,7 @@
     "astro": "astro"
   },
   "dependencies": {
-    "@astrojs/tailwind": "^5.1.4",
+    "@astrojs/tailwind": "^6.0.0",
     "@giscus/react": "^3.1.0",
     "@radix-ui/react-dialog": "^1.1.6",
     "@radix-ui/react-dropdown-menu": "^2.1.4",