Fix very minor code formatting issue

Author: 0xced

src/Log4NetTextFormatter.cs

@@ -303,7 +303,7 @@ private void WriteSequenceProperty(XmlWriter writer, string propertyName, Sequen
         {
             foreach (var (value, i) in sequenceValue.Elements.Select((e, i) => (e, i)))
             {
-                WritePropertyElement(writer,$"{propertyName}[{i}]", value);
+                WritePropertyElement(writer, $"{propertyName}[{i}]", value);
             }
         }