build(deps): bump @nextcloud/upload in /build/frontend-legacy

Bumps [@nextcloud/upload](https://github.com/nextcloud-libraries/nextcloud-upload) from 1.11.1 to 1.12.0.
- [Release notes](https://github.com/nextcloud-libraries/nextcloud-upload/releases)
- [Changelog](https://github.com/nextcloud-libraries/nextcloud-upload/blob/main/CHANGELOG.md)
- [Commits](nextcloud-libraries/nextcloud-upload@v1.11.1...v1.12.0)

---
updated-dependencies:
- dependency-name: "@nextcloud/upload"
  dependency-version: 1.12.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

build/frontend-legacy/package-lock.json

@@ -44,7 +44,7 @@
     "@nextcloud/paths": "^3.1.0",
     "@nextcloud/router": "^3.1.0",
     "@nextcloud/sharing": "^0.4.0",
-    "@nextcloud/upload": "^1.11.1",
+    "@nextcloud/upload": "^1.12.0",
     "@nextcloud/vue": "^8.40.0",
     "@simplewebauthn/browser": "^13.3.0",
     "@vue/web-component-wrapper": "^1.3.0",