Add CongressInvests API to Finance section

Author: dianahub

README.md

@@ -770,6 +770,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Binlist](https://binlist.net/) | Public access to a database of IIN/BIN information | No | Yes | Unknown | |
 | [Boleto.Cloud](https://boleto.cloud/) | A api to generate boletos in Brazil | `apiKey` | Yes | Unknown | |
 | [Citi](https://sandbox.developerhub.citi.com/api-catalog-list) | All Citigroup account and statement data APIs | `apiKey` | Yes | Unknown | |
+| [CongressInvests](https://congressinvests.com) | Real-time U.S. congressional stock trade disclosures from Senate EFD and House Clerk | `apiKey` | Yes | Yes | |
 | [Econdb](https://www.econdb.com/api/) | Global macroeconomic data | No | Yes | Yes | |
 | [EconPulse](https://econpulse.io) | Live economic data — CPI, PPI, energy, treasury rates, BTC premium | `apiKey` | Yes | Yes |
 | [Fed Treasury](https://fiscaldata.treasury.gov/api-documentation/) | U.S. Department of the Treasury Data | No | Yes | Unknown | |