Applied codestyle to all .cs files

src/NadekoBot/Common/Yml/UriConverter.cs

@@ -1,4 +1,4 @@
-#nullable disable
+#nullable disable
 using YamlDotNet.Core;
 using YamlDotNet.Core.Events;
 using YamlDotNet.Serialization;
@@ -22,4 +22,4 @@ public class UriConverter : IYamlTypeConverter
         var uri = (Uri)value;
         emitter.Emit(new Scalar(uri.ToString()));
     }
-}
+}