build(deps): bump gatsby-transformer-sharp from 2.9.0 to 2.11.0 in /docs

Bumps [gatsby-transformer-sharp](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-transformer-sharp) from 2.9.0 to 2.11.0.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-transformer-sharp/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/[email protected]/packages/gatsby-transformer-sharp)

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

Author: dependabot[bot]

docs/package-lock.json

@@ -36,7 +36,7 @@
     "gatsby-remark-responsive-iframe": "^2.8.0",
     "gatsby-source-filesystem": "^2.8.1",
     "gatsby-transformer-remark": "^2.13.1",
-    "gatsby-transformer-sharp": "^2.9.0",
+    "gatsby-transformer-sharp": "^2.11.0",
     "gatsby-transformer-yaml": "^2.8.0",
     "polished": "^4.0.5",
     "prism-react-renderer": "^1.1.1",