Change config property/setting for add_record_metadata

[freimer]

Problem

Fixes issue #34 . wrong config property/setting was used to add metadata. It is add_record_metadata, not add_metadata_columns. Tested on my own data pipelines and it works with this simple change.

Proposed changes

Change config property/setting from add_metadata_columns to add_record_metadata

Types of changes

What types of changes does your code introduce to PipelineWise? Put an x in the boxes that apply

• [X] Bugfix (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)
• [X] Documentation Update (if none of the other choices apply)

Checklist

• [X] Description above provides context of the change
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] Unit tests for changes (not needed for documentation changes)
• [ ] CI checks pass with my changes
• [ ] Bumping version in setup.py is an individual PR and not mixed with feature or bugfix PRs
• [ ] Commits follow "How to write a good git commit message"
• [X] Relevant documentation is updated including usage instructions

[aaronsteers]

@freimer - Thanks for this contribution! 👍 Looks good! 🚢