Bump react-helmet and @types/react-helmet

Bumps [react-helmet](https://github.com/nfl/react-helmet) and [@types/react-helmet](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/react-helmet). These dependencies needed to be updated together.

Updates `react-helmet` from 5.2.1 to 6.1.0
- [Release notes](https://github.com/nfl/react-helmet/releases)
- [Changelog](https://github.com/nfl/react-helmet/blob/master/CHANGELOG.md)
- [Commits](https://github.com/nfl/react-helmet/commits/6.1.0)

Updates `@types/react-helmet` from 5.0.14 to 6.1.5
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/react-helmet)

---
updated-dependencies:
- dependency-name: react-helmet
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: "@types/react-helmet"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -45,7 +45,7 @@
     "react-content-loader": "^3.1.2",
     "react-dom": "^17.0.2",
     "react-ga": "^2.7.0",
-    "react-helmet": "^5.2.1",
+    "react-helmet": "^6.1.0",
     "react-markdown": "^4.0.3",
     "react-redux": "^7.1.3",
     "react-router-dom": "^5.1.2",
@@ -82,7 +82,7 @@
     "@types/react": "^17.0.40",
     "@types/react-content-loader": "^3.1.4",
     "@types/react-dom": "^17.0.13",
-    "@types/react-helmet": "^5.0.11",
+    "@types/react-helmet": "^6.1.5",
     "@types/react-redux": "^7.1.4",
     "@types/react-router-dom": "^4.3.5",
     "@types/react-tooltip": "3.9.3",