upgraded react-router-dom to latest v6 (#300)

Author: zalexa19

client/package-lock.json

@@ -31,7 +31,7 @@
     "react-dom": "19.2.4",
     "react-icons": "^5.0.1",
     "react-markdown": "^10.1.0",
-    "react-router-dom": "^6.22.0",
+    "react-router-dom": "^6.30.3",
     "remark-breaks": "^4.0.0",
     "remark-gfm": "^4.0.1"
   },