build(deps): bump @emotion/react from 11.7.1 to 11.8.1 in /docs

Bumps [@emotion/react](https://github.com/emotion-js/emotion) from 11.7.1 to 11.8.1.
- [Release notes](https://github.com/emotion-js/emotion/releases)
- [Changelog](https://github.com/emotion-js/emotion/blob/main/CHANGELOG.md)
- [Commits](https://github.com/emotion-js/emotion/compare/@emotion/react@11.7.1...@emotion/react@11.8.1)

---
updated-dependencies:
- dependency-name: "@emotion/react"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

docs/package.json

@@ -6,7 +6,7 @@
   "author": "",
   "license": "MIT",
   "dependencies": {
-    "@emotion/react": "^11.7.1",
+    "@emotion/react": "^11.8.1",
     "@emotion/styled": "^11.6.0",
     "@mdx-js/mdx": "^1.6.22",
     "@mdx-js/react": "^1.6.16",
@@ -25,7 +25,7 @@
     "gatsby-plugin-react-svg": "^3.1.0",
     "gatsby-plugin-robots-txt": "^1.7.0",
     "gatsby-plugin-sharp": "^4.6.0",
-    "gatsby-plugin-sitemap": "^5.6.0",
+    "gatsby-plugin-sitemap": "^5.9.0",
     "gatsby-remark-autolink-headers": "^5.6.0",
     "gatsby-remark-copy-linked-files": "^5.6.0",
     "gatsby-remark-external-links": "^0.0.4",