Bump styled-components

Bumps [styled-components](https://github.com/styled-components/styled-components) from 6.1.1 to 6.1.6.
- [Release notes](https://github.com/styled-components/styled-components/releases)
- [Commits](styled-components/styled-components@v6.1.1...v6.1.6)

---
updated-dependencies:
- dependency-name: styled-components
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

graylog2-web-interface/packages/graylog-web-plugin/package.json

@@ -50,7 +50,7 @@
     "react-router-bootstrap": "0.26.2",
     "react-router-dom": "6.18.0",
     "reflux": "0.2.13",
-    "styled-components": "6.1.1",
+    "styled-components": "6.1.6",
     "typescript": "5.3.3",
     "use-query-params": "^2.2.0",
     "webpack": "5.89.0",