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

Author: renovate[bot]

frontend/package.json

@@ -12,7 +12,7 @@
     "react-dom": "^16.14.0",
     "react-redux": "^8.0.5",
     "react-scripts": "5.0.1",
-    "styled-components": "^4.4.1"
+    "styled-components": "^6.0.0"
   },
   "scripts": {
     "start": "react-scripts start",