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

Author: renovate[bot]

package.json

@@ -55,7 +55,7 @@
     "react-dom": "18.2.0",
     "react-helmet": "6.1.0",
     "react-typography": "0.16.20",
-    "styled-components": "5.3.10",
+    "styled-components": "6.0.4",
     "typeface-merriweather": "1.1.13",
     "typeface-montserrat": "1.1.13",
     "typography": "0.16.21",