Bump the docusaurus group with 3 updates (#2808)

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

Author: dependabot[bot]

package.json

@@ -12,9 +12,9 @@
     "deploy": "docusaurus deploy"
   },
   "dependencies": {
-    "@docusaurus/core": "^3.8.1",
-    "@docusaurus/preset-classic": "^3.8.1",
-    "@docusaurus/theme-mermaid": "^3.8.1",
+    "@docusaurus/core": "^3.9.1",
+    "@docusaurus/preset-classic": "^3.9.1",
+    "@docusaurus/theme-mermaid": "^3.9.1",
     "@mdx-js/react": "^3.1.1",
     "@easyops-cn/docusaurus-search-local": "^0.52.1",
     "by-node-env": "^2.0.1",