fix(deps): update dependency tailwindcss to v4

Author: renovate[bot]

package.json

@@ -47,7 +47,7 @@
 		"prettier-plugin-astro": "^0.14.1",
 		"sharp": "^0.33.5",
 		"smartypants": "^0.2.2",
-		"tailwindcss": "^3.4.17",
+		"tailwindcss": "^4.0.15",
 		"typescript": "^5.8.2",
 		"xss": "^1.0.15"
 	},