build(deps): bump org.springframework.boot from 4.0.5 to 4.0.6 (#353)

Bumps org.springframework.boot from 4.0.5 to 4.0.6.

---
updated-dependencies:
- dependency-name: org.springframework.boot
  dependency-version: 4.0.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Patrick Boos <patrick.boos@getyourguide.com>

Author: dependabot[bot]