Bump bpmn-js from 17.11.1 to 18.2.0 in /generation-ui

Bumps [bpmn-js](https://github.com/bpmn-io/bpmn-js) from 17.11.1 to 18.2.0.
- [Release notes](https://github.com/bpmn-io/bpmn-js/releases)
- [Changelog](https://github.com/bpmn-io/bpmn-js/blob/develop/CHANGELOG.md)
- [Commits](bpmn-io/bpmn-js@v17.11.1...v18.2.0)

---
updated-dependencies:
- dependency-name: bpmn-js
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

generation-ui/package.json

@@ -22,7 +22,7 @@
         "@angular/platform-browser": "^19.0.5",
         "@angular/platform-browser-dynamic": "^19.0.5",
         "@angular/router": "^19.0.5",
-        "bpmn-js": "^17.11.1",
+        "bpmn-js": "^18.2.0",
         "bpmn-js-properties-panel": "^5.25.0",
         "bpmn-token": "^1.0.3",
         "file-saver-es": "^2.0.5",