Update dependency @vitejs/plugin-react to v6

Author: renovate[bot]

packages/block-editor/package.json

@@ -27,7 +27,7 @@
         "@tailwindcss/vite": "^4.1.11",
         "@types/react": "^19.1.9",
         "@types/react-dom": "^19.1.7",
-        "@vitejs/plugin-react": "^5.0.0",
+        "@vitejs/plugin-react": "^6.0.0",
         "autoprefixer": "^10.4.21",
         "postcss": "^8.5.6",
         "tailwindcss": "^4.1.11",