Update styled-components to v6.0.4

| datasource | package           | from       | to    |
| ---------- | ----------------- | ---------- | ----- |
| npm        | styled-components | 6.0.0-rc.6 | 6.0.4 |

Author: renovate[bot]

package-lock.json

@@ -57,7 +57,7 @@
     "react-simpler-select": "3.0.0",
     "react-tabs": "3.0.0",
     "reading-time": "1.1.0",
-    "styled-components": "6.0.0-rc.6"
+    "styled-components": "6.0.4"
   },
   "scripts": {
     "start": "npm run server -s & npm run watch -s",