Bump backbone from 1.4.0 to 1.4.1

Bumps [backbone](https://github.com/jashkenas/backbone) from 1.4.0 to 1.4.1.
- [Release notes](https://github.com/jashkenas/backbone/releases)
- [Commits](jashkenas/backbone@1.4.0...1.4.1)

---
updated-dependencies:
- dependency-name: backbone
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package-lock.json

@@ -42,7 +42,7 @@
     "@nextcloud/vue": "^3.10.2",
     "@nextcloud/vue-dashboard": "^2.0.1",
     "autosize": "^4.0.4",
-    "backbone": "^1.4.0",
+    "backbone": "^1.4.1",
     "blueimp-md5": "^2.18.0",
     "bootstrap": "^4.6.1",
     "camelcase": "^6.2.1",