BUGFIX: StatusBarI3 comma

Program.cs

@@ -340,7 +340,7 @@ namespace i3csstatus {
 		override protected void initOutput(TextWriter w)
 		{
 			w.WriteLine("{\"version\":1}");
-			w.WriteLine("[");
+			w.WriteLine("[{}");
 		}
 		override protected void format(TextWriter w, List<Element> elements)
 		{
@@ -351,6 +351,7 @@ namespace i3csstatus {
 			}).ToArray());
 			var opt = new JsonSerializerOptions();
 			opt.DefaultIgnoreCondition =  System.Text.Json.Serialization.JsonIgnoreCondition.WhenWritingNull;
+			w.Write(",");
 			w.WriteLine(json.ToJsonString(opt));
 		}
 	}