build(deps): bump gatsby-plugin-google-analytics in /docs

Bumps [gatsby-plugin-google-analytics](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-google-analytics) from 2.3.13 to 2.3.14.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-plugin-google-analytics/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/gatsby-plugin-google-analytics@2.3.14/packages/gatsby-plugin-google-analytics)

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

docs/package.json

@@ -16,7 +16,7 @@
     "gatsby-plugin-canonical-urls": "^2.3.10",
     "gatsby-plugin-catch-links": "^2.3.11",
     "gatsby-plugin-emotion": "^4.3.10",
-    "gatsby-plugin-google-analytics": "^2.3.13",
+    "gatsby-plugin-google-analytics": "^2.3.14",
     "gatsby-plugin-manifest": "^2.4.27",
     "gatsby-plugin-mdx": "^1.2.40",
     "gatsby-plugin-netlify": "^2.3.13",