chore(deps): bump @mantine/notifications in /web/ui (#15658)

Bumps [@mantine/notifications](https://github.com/mantinedev/mantine/tree/HEAD/packages/@mantine/notifications) from 7.13.1 to 7.15.0.
- [Release notes](https://github.com/mantinedev/mantine/releases)
- [Changelog](https://github.com/mantinedev/mantine/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mantinedev/mantine/commits/7.15.0/packages/@mantine/notifications

)

---
updated-dependencies:
- dependency-name: "@mantine/notifications"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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