WIll "RC" be added to billing_code_type in the in_network_rate schema

[josemedinawork]

The documentation on GitHub under "Additional Notes Concerning billing_code_type" indicate that billing_code_type allows for the value RC, however, the value is not present in the schema.
"billing_code_type": {
"enum": [
"CPT",
"HCPCS",
"ICD",
"MS-DRG",
"R-DRG",
"S-DRG",
"APS-DRG",
"AP-DRG",
"APR-DRG",
"APC",
"NDC",
"HIPPS",
"LOCAL",
"EAPG",
"CDT"
]
}

[shaselton-usds]

Thanks for the extra set of eyes!

PR opened here: #351