chore(deps): update tailwindcss monorepo to v4.0.15

Author: renovate[bot]

package.json

@@ -80,7 +80,7 @@
     "remark-mdx-frontmatter": "^5.0.0",
     "remark-rehype": "^11.1.0",
     "stylelint": "^16.7.0",
-    "tailwindcss": "4.0.14",
+    "tailwindcss": "4.0.15",
     "ts-node": "^10.9.2",
     "typescript": "5.8.2",
     "typescript-eslint": "^8.0.1",