update docusaurus to 3.9

package.json

@@ -35,7 +35,7 @@
         "node": ">=22.0.0"
     },
     "dependencies": {
-        "@docusaurus/plugin-client-redirects": "^3.8.1",
+        "@docusaurus/plugin-client-redirects": "^3.9.0",
         "@fortawesome/fontawesome-free": "^6.1.1",
         "@gridspace/app-server": "^0.0.18",
         "@gridspace/basic-ftp": "^5.0.5",
@@ -65,8 +65,8 @@
         "ws": "^8.18.2"
     },
     "devDependencies": {
-        "@docusaurus/core": "^3.7.0",
-        "@docusaurus/preset-classic": "^3.7.0",
+        "@docusaurus/core": "^3.9.0",
+        "@docusaurus/preset-classic": "^3.9.0",
         "@electron/notarize": "^3.0.0",
         "copy-webpack-plugin": "^12.0.2",
         "docusaurus-lunr-search": "^3.6.0",