chore(deps): bump @docusaurus/preset-classic from 3.8.1 to 3.9.1 in /docs (#35442)

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docs/package.json

@@ -28,10 +28,10 @@
   },
   "dependencies": {
     "@ant-design/icons": "^6.1.0",
-    "@docusaurus/core": "3.8.1",
-    "@docusaurus/plugin-client-redirects": "3.8.1",
-    "@docusaurus/preset-classic": "3.8.1",
-    "@docusaurus/theme-mermaid": "^3.8.1",
+    "@docusaurus/core": "3.9.1",
+    "@docusaurus/plugin-client-redirects": "3.9.1",
+    "@docusaurus/preset-classic": "3.9.1",
+    "@docusaurus/theme-mermaid": "^3.9.1",
     "@emotion/core": "^10.0.27",
     "@emotion/react": "^11.13.3",
     "@emotion/styled": "^10.0.27",