Add Open Government, Estonia (#2549)

README.md

@@ -807,6 +807,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Open Government, Croatia](https://data.gov.hr/en) | Croatia Government Open Data | No | Yes | Unknown |
 | [Open Government, Cyprus](https://data.gov.cy/?language=en) | Cyprus Government Open Data | No | Yes | Unknown |
 | [Open Government, Denmark](https://www.opendata.dk/) | Denmark Government Open Data | No | Yes | Unknown |
+| [Open Government, Estonia](https://avaandmed.eesti.ee/instructions/opendata-dataset-api) | Estonia Government Open Data | `apiKey` | Yes | Unknown |
 | [Open Government, Finland](https://www.avoindata.fi/en) | Finland Government Open Data | No | Yes | Unknown |
 | [Open Government, France](https://www.data.gouv.fr/) | French Government Open Data | `apiKey` | Yes | Unknown |
 | [Open Government, Germany](https://www.govdata.de/daten/-/details/govdata-metadatenkatalog) | Germany Government Open Data | No | Yes | Unknown |