chore: update styled-components in the playground

Author: boazpoolman

playground/package.json

@@ -24,7 +24,7 @@
     "react-dom": "^18.0.0",
     "react-router-dom": "^6.0.0",
     "strapi-plugin-config-sync": "./..",
-    "styled-components": "5.3.3"
+    "styled-components": "^6.0.0"
   },
   "author": {
     "name": "A Strapi developer"