Bump @oclif/plugin-help from 5.2.20 to 6.0.3 (#809)

* Bump @oclif/plugin-help from 5.2.20 to 6.0.3

Bumps [@oclif/plugin-help](https://github.com/oclif/plugin-help) from 5.2.20 to 6.0.3.
- [Release notes](https://github.com/oclif/plugin-help/releases)
- [Changelog](https://github.com/oclif/plugin-help/blob/main/CHANGELOG.md)
- [Commits](oclif/plugin-help@5.2.20...6.0.3)

---
updated-dependencies:
- dependency-name: "@oclif/plugin-help"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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* Add changeset for dependabot updates

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.changeset/smart-carpets-count.md

@@ -0,0 +1,5 @@
+---
+'@sigstore/cli': patch
+---
+
+Bump @oclif/plugin-help from 5.2.20 to 6.0.3