📚 Add .NET 5 in the readme

Author: pleonex

PULL_REQUEST_TEMPLATE.md

@@ -1,8 +1,9 @@
 ### Description
+
 A clear and concise description of what the bug or feature is.
 
 ### Example
-Small example on how to use the new classes and methods.
 
+Small example on how to use the new classes and methods.
 
-Linked issue:
+This closes #

README.md

@@ -43,8 +43,8 @@ your solution (.sln) file with the following content:
 
 ## Build
 
-Since the unit tests are validated against .NET Core and .NET Framework or Mono
-both runtime must be installed on the machine. Then run:
+Since the unit tests are validated against .NET 5, .NET Core and .NET Framework
+and Mono, the three runtimes must be installed on the machine. Then run:
 
 ```sh
 dotnet tool restore