Clarification of the location of the 'Serilog' section in appsettings…

….json file.

README.md

@@ -2,7 +2,7 @@
 
 A Serilog settings provider that reads from [Microsoft.Extensions.Configuration](https://docs.microsoft.com/en-us/aspnet/core/fundamentals/configuration/?view=aspnetcore-3.1) sources, including .NET Core's `appsettings.json` file.
 
-By default, configuration is read from the `Serilog` section.
+By default, configuration is read from the `Serilog` section that should be at the **top level** of the configuration file.
 
 ```json
 {