fix: upgrade gatsby from 2.23.0 to 2.23.1

Snyk has created this PR to upgrade gatsby from 2.23.0 to 2.23.1.

See this package in NPM:
https://www.npmjs.com/package/gatsby

See this project in Snyk:
https://app.snyk.io/org/github-newrelic/project/7fcca766-b226-4202-a6f2-d2d816b1e69d?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -8,7 +8,7 @@
     "classnames": "^2.2.6",
     "date-fns": "^2.14.0",
     "eslint-plugin-react-hooks": "^4.0.4",
-    "gatsby": "^2.23.0",
+    "gatsby": "^2.23.1",
     "gatsby-image": "^2.4.6",
     "gatsby-plugin-google-tagmanager": "^2.3.4",
     "gatsby-plugin-manifest": "^2.4.10",