Bump helmet from 4.6.0 to 7.1.0

Bumps [helmet](https://github.com/helmetjs/helmet) from 4.6.0 to 7.1.0.
- [Changelog](https://github.com/helmetjs/helmet/blob/main/CHANGELOG.md)
- [Commits](helmetjs/helmet@v4.6.0...v7.1.0)

---
updated-dependencies:
- dependency-name: helmet
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

package.json

@@ -55,7 +55,7 @@
     "express": "4.19.2",
     "express-http-proxy": "1.6.3",
     "express-session": "1.18.0",
-    "helmet": "4.6.0",
+    "helmet": "7.1.0",
     "https-proxy-agent": "5.0.1",
     "jose": "4.15.5",
     "nav-frontend-chevron": "1.0.28",