build(deps): bump emotion-theming from 10.0.27 to 11.0.0 in /docs

Bumps [emotion-theming](https://github.com/emotion-js/emotion) from 10.0.27 to 11.0.0.
- [Release notes](https://github.com/emotion-js/emotion/releases)
- [Changelog](https://github.com/emotion-js/emotion/blob/master/CHANGELOG.md)
- [Commits](https://github.com/emotion-js/emotion/compare/emotion-theming@10.0.27...emotion-theming@11.0.0)

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

docs/package.json

@@ -10,7 +10,7 @@
     "@emotion/styled": "^10.0.27",
     "@mdx-js/mdx": "^1.6.22",
     "@mdx-js/react": "^1.6.16",
-    "emotion-theming": "^10.0.27",
+    "emotion-theming": "^11.0.0",
     "gatsby": "^2.29.3",
     "gatsby-alias-imports": "^1.0.6",
     "gatsby-plugin-canonical-urls": "^2.7.0",