Bump peter-evans/slash-command-dispatch in /.github/workflows

Bumps [peter-evans/slash-command-dispatch](https://github.com/peter-evans/slash-command-dispatch) from 4.0.0 to 5.0.2.
- [Release notes](https://github.com/peter-evans/slash-command-dispatch/releases)
- [Commits](https://github.com/peter-evans/slash-command-dispatch/compare/13bc09769d122a64f75aa5037256f6f2d78be8c4...9bdcd7914ec1b75590b790b844aa3b8eee7c683a)

---
updated-dependencies:
- dependency-name: peter-evans/slash-command-dispatch
  dependency-version: 5.0.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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