fix(deps): update dependency styled-components to v6

Author: renovate[bot]

package.json

@@ -12,7 +12,7 @@
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
     "react-helmet": "^6.1.0",
-    "styled-components": "^5.3.11"
+    "styled-components": "^6.0.0"
   },
   "devDependencies": {
     "@types/node": "^22.0.0",