Bump axios from 1.4.0 to 1.6.0 in /frontend

Bumps [axios](https://github.com/axios/axios) from 1.4.0 to 1.6.0.
- [Release notes](https://github.com/axios/axios/releases)
- [Changelog](https://github.com/axios/axios/blob/v1.x/CHANGELOG.md)
- [Commits](https://github.com/axios/axios/compare/v1.4.0...v1.6.0)

---
updated-dependencies:
- dependency-name: axios
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

frontend/package.json

@@ -16,7 +16,7 @@
     "@navikt/ds-tailwind": "^4.6.1",
     "@navikt/ds-tokens": "^4.6.1",
     "autoprefixer": "10.4.14",
-    "axios": "^1.4.0",
+    "axios": "^1.6.0",
     "postcss": "8.4.6",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",