docs(deps): bump nextra-theme-docs from 2.7.1 to 2.8.0 in /docs (#901)

Bumps [nextra-theme-docs](https://github.com/shuding/nextra) from 2.7.1 to 2.8.0.
- [Release notes](https://github.com/shuding/nextra/releases)
- [Commits](https://github.com/shuding/nextra/compare/nextra-theme-docs@2.7.1...nextra-theme-docs@2.8.0)

---
updated-dependencies:
- dependency-name: nextra-theme-docs
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docs/package.json

@@ -9,7 +9,7 @@
   "dependencies": {
     "next": "^13.4.7",
     "nextra": "^2.5.0",
-    "nextra-theme-docs": "^2.7.1",
+    "nextra-theme-docs": "^2.8.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0"
   }