Bump @umbraco-cms/backoffice in /Umbraco.Community.UmbNav

Bumps [@umbraco-cms/backoffice](https://github.com/umbraco/Umbraco-CMS) from 17.0.0 to 17.1.0.
- [Release notes](https://github.com/umbraco/Umbraco-CMS/releases)
- [Commits](umbraco/Umbraco-CMS@release-17.0.0...release-17.1.0)

---
updated-dependencies:
- dependency-name: "@umbraco-cms/backoffice"
  dependency-version: 17.1.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Umbraco.Community.UmbNav/package-lock.json

@@ -21,7 +21,7 @@
   "devDependencies": {
     "@playwright/test": "^1.56.1",
     "@types/node": "^24.5.0",
-    "@umbraco-cms/backoffice": "~17.0.0",
+    "@umbraco-cms/backoffice": "~17.1.0",
     "typescript": "^5.8.3",
     "vite": "^7.1.11",
      "prompt": "^1.2.0"