chore(deps): bump @docusaurus/theme-mermaid in /website

Bumps [@docusaurus/theme-mermaid](https://github.com/facebook/docusaurus/tree/HEAD/packages/docusaurus-theme-mermaid) from 2.4.1 to 2.4.3.
- [Release notes](https://github.com/facebook/docusaurus/releases)
- [Changelog](https://github.com/facebook/docusaurus/blob/main/CHANGELOG.md)
- [Commits](https://github.com/facebook/docusaurus/commits/v2.4.3/packages/docusaurus-theme-mermaid)

---
updated-dependencies:
- dependency-name: "@docusaurus/theme-mermaid"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

website/package.json

@@ -11,7 +11,7 @@
   "dependencies": {
     "@docusaurus/core": "^2.4.1",
     "@docusaurus/preset-classic": "^2.4.1",
-    "@docusaurus/theme-mermaid": "^2.4.1",
+    "@docusaurus/theme-mermaid": "^2.4.3",
     "clsx": "^1.2.1",
     "react": "^17.0.2",
     "react-dom": "^17.0.2",