chore(deps): bump gatsby-plugin-react-helmet in /client

Bumps [gatsby-plugin-react-helmet](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-react-helmet) from 3.8.0 to 3.9.0.
- [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@3.9.0/packages/gatsby-plugin-react-helmet)

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

client/package-lock.json

@@ -12977,9 +12977,9 @@
       }
     },
     "gatsby-plugin-react-helmet": {
-      "version": "3.8.0",
-      "resolved": "https://registry.npmjs.org/gatsby-plugin-react-helmet/-/gatsby-plugin-react-helmet-3.8.0.tgz",
-      "integrity": "sha512-N3foQUlaA7S7hRHpUtM30eYfhaE/wfC5xJhZ2UJCeos/rRDA6RHEp4IGI+VIs6+4T4ClS9pM9jwg8TfcqNlAiQ==",
+      "version": "3.9.0",
+      "resolved": "https://registry.npmjs.org/gatsby-plugin-react-helmet/-/gatsby-plugin-react-helmet-3.9.0.tgz",
+      "integrity": "sha512-u9KAVomMMYvX5swwMF2ToyyVWwwduLMuRggeydYGVae9IOz9pRK4QZYpN303tWeuOSKNSAOVo4tcSQ40//jgVg==",
       "requires": {
         "@babel/runtime": "^7.12.5"
       },

client/package.json

@@ -36,7 +36,7 @@
     "gatsby-plugin-create-client-paths": "^2.8.0",
     "gatsby-plugin-manifest": "^2.10.0",
     "gatsby-plugin-postcss": "^2.3.13",
-    "gatsby-plugin-react-helmet": "^3.8.0",
+    "gatsby-plugin-react-helmet": "^3.9.0",
     "gatsby-plugin-remove-serviceworker": "^1.0.0",
     "gatsby-remark-prismjs": "^3.12.0",
     "gatsby-source-filesystem": "^2.10.0",