chore(assistant): update dependency styled-components to v6.3.8

Author: renovate[bot]

package-lock.json

@@ -102,7 +102,7 @@
     "react-dom": "18.3.1",
     "react-router-dom": "^7.0.0",
     "replace-json-property": "1.9.0",
-    "styled-components": "6.1.19",
+    "styled-components": "6.3.8",
     "ts-jest": "29.4.4",
     "ts-loader": "^9.4.2",
     "ts-node": "10.9.2",