Update dependency vite to v6

Author: renovate[bot]

package.json

@@ -26,7 +26,7 @@
   "dependencies": {
     "commander": "^12.1.0",
     "reveal.js": "5.1.0",
-    "vite": "5.4.8",
+    "vite": "6.0.8",
     "vite-plugin-ejs": "1.7.0",
     "vite-plugin-static-copy": "1.0.6"
   },