Bump @nextcloud/webpack-vue-config from 5.1.0 to 5.2.1

Bumps [@nextcloud/webpack-vue-config](https://github.com/nextcloud/webpack-vue-config) from 5.1.0 to 5.2.1.
- [Release notes](https://github.com/nextcloud/webpack-vue-config/releases)
- [Changelog](https://github.com/nextcloud/webpack-vue-config/blob/master/CHANGELOG.md)
- [Commits](nextcloud-libraries/webpack-vue-config@v5.1.0...v5.2.1)

---
updated-dependencies:
- dependency-name: "@nextcloud/webpack-vue-config"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]