Generate latest from spec version 1.72.0

[bradymholt]

This generates the client from spec version 1.72.0.

Additions:

• Adds support for creating scheduled transactions
• Adds support for retrieving transactions for a particular month

[bradymholt]

@dbertram - I regenerated off of 1.72.0 and pushed up changes.

[github-actions[bot]]

The changes in this PR were just released in v2.4.0 🎉.