throw ArgumentException at the end of ConvertTo method

Author: Sergey Komisarchik

src/Serilog.Settings.Configuration/Settings/Configuration/ConfigurationSectionArgumentValue.cs

@@ -33,7 +33,7 @@ public object ConvertTo(Type toType)
                 return new Action<LoggerConfiguration>(_configReader.Configure);
             }
 
-            throw new Exception($"Handling {configurationType} is not implemented.");
+            throw new ArgumentException($"Handling {configurationType} is not implemented.");
         }
     }
 }