Bump react-router from 7.6.1 to 7.12.0 in /jlmap-vaadin-demo

Bumps [react-router](https://github.com/remix-run/react-router/tree/HEAD/packages/react-router) from 7.6.1 to 7.12.0.
- [Release notes](https://github.com/remix-run/react-router/releases)
- [Changelog](https://github.com/remix-run/react-router/blob/main/packages/react-router/CHANGELOG.md)
- [Commits](https://github.com/remix-run/react-router/commits/react-router@7.12.0/packages/react-router)

---
updated-dependencies:
- dependency-name: react-router
  dependency-version: 7.12.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

jlmap-vaadin-demo/package.json

@@ -20,7 +20,7 @@
     "lit": "3.3.0",
     "react": "18.3.1",
     "react-dom": "18.3.1",
-    "react-router": "7.6.1"
+    "react-router": "7.12.0"
   },
   "devDependencies": {
     "@babel/preset-react": "7.27.1",
@@ -63,7 +63,7 @@
       "lit": "3.3.0",
       "react": "18.3.1",
       "react-dom": "18.3.1",
-      "react-router": "7.6.1"
+      "react-router": "7.12.0"
     },
     "devDependencies": {
       "@babel/preset-react": "7.27.1",