Bump helmet from 3.22.0 to 3.23.0

Bumps [helmet](https://github.com/helmetjs/helmet) from 3.22.0 to 3.23.0.
- [Release notes](https://github.com/helmetjs/helmet/releases)
- [Changelog](https://github.com/helmetjs/helmet/blob/master/CHANGELOG.md)
- [Commits](helmetjs/helmet@v3.22.0...v3.23.0)

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

package.json

@@ -42,7 +42,7 @@
     "express": "^4.17.1",
     "express-sitemap": "^1.8.0",
     "express-sslify": "^1.2.0",
-    "helmet": "^3.22.0",
+    "helmet": "^3.23.0",
     "js-yaml": "^3.14.0",
     "mime": "^2.4.6",
     "morgan": "^1.10.0",