Bump nesbot/carbon from 2.72.2 to 2.73.0 in /examples/LaravelSampleApp

Bumps [nesbot/carbon](https://github.com/CarbonPHP/carbon) from 2.72.2 to 2.73.0.
- [Release notes](https://github.com/CarbonPHP/carbon/releases)
- [Commits](CarbonPHP/carbon@2.72.2...2.73.0)

---
updated-dependencies:
- dependency-name: nesbot/carbon
  dependency-version: 2.73.0
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]