project-schema: Add Organization.beneficialOwners

[duncandewhurst]

Related issues

• Closes beneficialOwners: incorporate beneficialOwners information using OCDS extension #399

Description

manage.py updates:

• Add beneficialOwners extension to profile
• Update 'paths to skip' logic in update_sub_schema_reference

Merge checklist

• Log your changes

If there are changes to project-schema.json or project-package-schema.json:

• Update the examples:
  • docs/examples/example.json
  • docs/examples/blank.json
• Run ./manage.py pre-commit to update docs/_static/i8n.csv

If you added a new definition to the schema, run ./manage.py pre-commit.

If you added a new codelist:

• Add an entry to docs/reference/codelists.md

[jpmckinney]

Some easy to resolve comments. Feel free to merge once resolved.