Allow whitespace in sticker names

DiscordChatExporter.Core/Discord/Data/Sticker.cs

@@ -4,6 +4,7 @@ using JsonExtensions.Reading;
 
 namespace DiscordChatExporter.Core.Discord.Data;
 
+// https://discord.com/developers/docs/resources/sticker#sticker-resource
 public record Sticker(Snowflake Id, string Name, StickerFormat Format, string SourceUrl)
 {
     private static string GetSourceUrl(Snowflake id, StickerFormat format)
@@ -15,7 +16,7 @@ public record Sticker(Snowflake Id, string Name, StickerFormat Format, string So
     public static Sticker Parse(JsonElement json)
     {
         var id = json.GetProperty("id").GetNonWhiteSpaceString().Pipe(Snowflake.Parse);
-        var name = json.GetProperty("name").GetNonWhiteSpaceString();
+        var name = json.GetProperty("name").GetNonNullString();
         var format = (StickerFormat)json.GetProperty("format_type").GetInt32();
 
         var sourceUrl = GetSourceUrl(id, format);