Update configuration.md with 'reveal' becoming 'show'

[donaldm314]

Change Summary

The command organize reveal is now organize show. This change merely updates the documentation accordingly.

Related issue number

Checklist

• [x] Tests for the changes exist and pass on CI
• [x] Documentation reflects the changes where applicable
• [x] Change is documented in CHANGELOG.md (if applicable)
• [x] My PR is ready to review

[tfeldmann]

Thank you!