Remove chatupdate compression arg shorthand (-c) (lay295#1087)

TwitchDownloaderCLI/Modes/Arguments/ChatUpdateArgs.cs

@@ -13,7 +13,7 @@ internal sealed class ChatUpdateArgs : TwitchDownloaderArgs
         [Option('o', "output", Required = true, HelpText = "Path to output file. File extension will be used to determine new chat type. Valid extensions are: .json, .html, and .txt.")]
         public string OutputFile { get; set; }
 
-        [Option('c', "compression", Default = ChatCompression.None, HelpText = "Compresses an output json chat file using a specified compression, usually resulting in 40-90% size reductions. Valid values are: None, Gzip.")]
+        [Option("compression", Default = ChatCompression.None, HelpText = "Compresses an output json chat file using a specified compression, usually resulting in 40-90% size reductions. Valid values are: None, Gzip.")]
         public ChatCompression Compression { get; set; }
 
         [Option('E', "embed-missing", Default = false, HelpText = "Embeds missing emotes, badges, and cheermotes. Already embedded images will be untouched.")]