Bump react-router-dom to ^7.9.1

Author: renovate[bot]

apps/pigment-css-vite-app/package.json

@@ -20,7 +20,7 @@
     "react": "^19.1.1",
     "react-dom": "^19.1.1",
     "react-error-boundary": "^6.0.0",
-    "react-router-dom": "^6.30.1",
+    "react-router-dom": "^7.9.1",
     "webfontloader": "^1.6.28"
   },
   "devDependencies": {