Add Nantes City open data (#1078)

Co-Authored-By: Yann Bertrand <5855339+yannbertrand@users.noreply.github.com>

README.md

@@ -490,6 +490,8 @@ API | Description | Auth | HTTPS | CORS |
 | [BCLaws](http://www.bclaws.ca/civix/template/complete/api/index.html) | Access to the laws of British Columbia | No | No | Unknown |
 | [BusinessUSA](https://business.usa.gov/developer) | Authoritative information on U.S. programs, events, services and more | `apiKey` | Yes | Unknown |
 | [Census.gov](https://www.census.gov/data/developers/data-sets.html) | The US Census Bureau provides various APIs and data sets on demographics and businesses | No | Yes | Unknown |
+| [City, Nantes Opendata](https://data.nantesmetropole.fr/pages/home/) | Nantes(FR) City Open Data | `apiKey` | Yes | Unknown |
+| [City, Prague Opendata](http://opendata.praha.eu/en) | Prague(CZ) City Open Data | No | No | Unknown |
 | [Colorado Data Engine](http://codataengine.org/) | Formatted and geolocated Colorado public data | No | Yes | Unknown |
 | [Colorado Information Marketplace](https://data.colorado.gov/) | Colorado State Government Open Data | No | Yes | Unknown |
 | [Data USA](https://datausa.io/about/api/) | US Public Data | No | Yes | Unknown |
@@ -509,7 +511,6 @@ API | Description | Auth | HTTPS | CORS |
 | [Open Government, New Zealand](https://www.data.govt.nz/) | New Zealand Government Open Data | No | Yes | Unknown |
 | [Open Government, Taiwan](https://data.gov.tw/) | Taiwan Government Open Data | No | Yes | Unknown |
 | [Open Government, USA](https://www.data.gov/) | United States Government Open Data | No | Yes | Unknown |
-| [Prague Opendata](http://opendata.praha.eu/en) | Prague City Open Data | No | No | Unknown |
 | [Regulations.gov](https://regulationsgov.github.io/developers/) | Federal regulatory materials to increase understanding of the Federal rule making process | `apiKey` | Yes | Unknown |
 | [Represent by Open North](https://represent.opennorth.ca/) | Find Canadian Government Representatives | No | Yes | Unknown |
 | [USAspending.gov](https://api.usaspending.gov/) | US federal spending data | No | Yes | Unknown |