ci: Implement dry-run option for release workflow

[wakamsha]

What changed / motivation ?

It would be nice to be able to confirm the next version number of this package in CI/CD before releasing it to production.

To achieve this, the dry-run option has been implemented in the release workflow.

Linked PR / Issues

• Implement release workflow rehearsal functionality #321

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• Chore (routine task, maintenance, or non-functional change that doesn't modify src or test files)

Pre-flight checklist

• I have read the Contributing Guidelines
• Performed a self-review of my code

References

• Configuration | semantic-release
• Workflow syntax for GitHub Actions - GitHub Enterprise Cloud Docs

[taigakiyokawa]

Nice option! 👍

[wakamsha]

Since this PR was merged, it option would be available.