Bump gatsby-plugin-react-helmet from 4.1.0 to 4.4.0

Bumps [gatsby-plugin-react-helmet](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-react-helmet) from 4.1.0 to 4.4.0.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-plugin-react-helmet/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/gatsby-plugin-react-helmet@4.4.0/packages/gatsby-plugin-react-helmet)

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

package.json

@@ -73,7 +73,7 @@
     "gatsby-plugin-canonical-urls": "^3.2.0",
     "gatsby-plugin-image": "^1.1.2",
     "gatsby-plugin-postcss": "^4.1.0",
-    "gatsby-plugin-react-helmet": "^4.1.0",
+    "gatsby-plugin-react-helmet": "^4.4.0",
     "gatsby-plugin-robots-txt": "^1.5.5",
     "gatsby-plugin-sharp": "^3.1.2",
     "gatsby-plugin-sitemap": "^3.1.0",