Bump @ckeditor/ckeditor5-vue from 5.1.0 to 7.3.0

Bumps [@ckeditor/ckeditor5-vue](https://github.com/ckeditor/ckeditor5-vue) from 5.1.0 to 7.3.0.
- [Release notes](https://github.com/ckeditor/ckeditor5-vue/releases)
- [Changelog](https://github.com/ckeditor/ckeditor5-vue/blob/master/CHANGELOG.md)
- [Commits](ckeditor/ckeditor5-vue@v5.1.0...v7.3.0)

---
updated-dependencies:
- dependency-name: "@ckeditor/ckeditor5-vue"
  dependency-version: 7.3.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]