build(deps): bump gatsby-plugin-offline from 3.2.27 to 3.7.1 in /docs (#1613)

Author: dependabot[bot]

docs/package-lock.json

@@ -21,7 +21,7 @@
     "gatsby-plugin-mdx": "^1.2.43",
     "gatsby-plugin-netlify": "^2.3.13",
     "gatsby-plugin-netlify-cache": "^1.2.0",
-    "gatsby-plugin-offline": "^3.2.27",
+    "gatsby-plugin-offline": "^3.7.1",
     "gatsby-plugin-react-helmet": "^3.3.10",
     "gatsby-plugin-react-svg": "^3.0.0",
     "gatsby-plugin-robots-txt": "^1.5.1",