Fix macro argument types (#180)

[fivetran-catfritz]

PR Overview

Package version introduced in this PR:

• v2.6.1

This PR addresses the following Issue/Feature(s):

• [Bug] Macro argument types are invalid #178

Summary of changes:

• Updates macro argument type annotations in macros_docs.yml to support dbt's validate_macro_args flag.

Submission Checklist

• Alignment meeting with the reviewer (if needed)
  • Timeline and validation requirements discussed
• Provide validation details:
  • Validation Steps: Check for unintentional effects (e.g., add/run consistency & integrity tests)
  • Testing Instructions: Confirm the change addresses the issue(s)
  • Focus Areas: Complex logic or queries that need extra attention
• Merge any relevant open PRs into this PR

Changelog

• Draft changelog for PR
• Final changelog for release review