build(deps): bump gatsby-plugin-offline from 3.7.1 to 3.10.0 in /docs

Bumps [gatsby-plugin-offline](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-offline) from 3.7.1 to 3.10.0.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-plugin-offline/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/[email protected]/packages/gatsby-plugin-offline)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

docs/package-lock.json

@@ -21,13 +21,13 @@
     "gatsby-plugin-mdx": "^1.7.1",
     "gatsby-plugin-netlify": "^2.8.0",
     "gatsby-plugin-netlify-cache": "^1.2.0",
-    "gatsby-plugin-offline": "^3.7.1",
+    "gatsby-plugin-offline": "^3.10.0",
     "gatsby-plugin-react-helmet": "^3.7.0",
     "gatsby-plugin-react-svg": "^3.0.0",
     "gatsby-plugin-robots-txt": "^1.5.1",
     "gatsby-plugin-sharp": "^2.11.2",
     "gatsby-plugin-sitemap": "^2.9.0",
-    "gatsby-remark-autolink-headers": "^2.8.0",
+    "gatsby-remark-autolink-headers": "^2.10.0",
     "gatsby-remark-copy-linked-files": "^2.7.0",
     "gatsby-remark-embedder": "^4.1.0",
     "gatsby-remark-external-links": "0.0.4",