Replace calls to /communication-costs/ with /communication_costs/

[jason-upchurch]

Summary

The /communication-costs/ pagination schema is being changed, so the endpoint is being deprecated in favor of (still to be provided) endpoint /communication_costs/ (see fecgov/openFEC#4203)

What we're after:
Replace cms API calls to /communication-costs/ with /communication_costs/

API Umbrella shows:

• Webappalerts
• Webappmonitor

have made API calls in the last 120 days.

Completion criteria:

• All calls to communication-costs are updated to communication_costs