Fix page title after i18n

[bearn01d]

This fixes #844 using translateService.instant('...'), considering the comment from #845.

### Checklist
- [x] The PR title is short and expressive.
- [x] I have updated the CHANGELOG.md and linked the changes to their issues. See [changelog_update.md](https://github.com/sovity/edc-ui/tree/main/docs/dev/changelog_updates.md) for more information.
- [ ] I have updated the Deployment Migration Notes Section in the CHANGELOG.md for any configuration / external API changes.
- [x] I have performed a **self-review**