fix: packages/demo-app-ts/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-BABELRUNTIME-10044504

Author: snyk-bot

packages/demo-app-ts/package.json

@@ -14,8 +14,8 @@
         "@patternfly/react-styles": "^6.0.0",
         "react": "^18",
         "react-dom": "^18",
-        "react-router": "^5.3.3",
-        "react-router-dom": "^5.3.3"
+        "react-router": "^6.0.0",
+        "react-router-dom": "^6.0.0"
     },
     "devDependencies": {
         "@pmmmwh/react-refresh-webpack-plugin": "0.5.7",