Update README.md (#1591)

* Update README.md

Fixed link to new solid community site. [Old one is discontinued](https://lists.w3.org/Archives/Public/public-solid/2020Oct/0005.html).

* Update README.md

Co-authored-by: Alain Bourgeois <alain.bourgeois10@gmail.com>

Author: Neurone

README.md

@@ -362,7 +362,7 @@ In order to really get a feel for the Solid platform, and to test out `solid`,
 you will need the following:
 
 1. A WebID profile and browser certificate from one of the Solid-compliant
-    identity providers, such as [solid.community](https://solid.community).
+    identity providers, such as [solidcommunity.net](https://solidcommunity.net).
 
 2. A server-side SSL certificate for `solid` to use (see the section below
     on creating a self-signed certificate for testing).