imp - Custom magic database file error message fixed

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To reduce confusion, we've corrected the invalid magic error message.

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Type: imp
Breaking: False
Doc Required: False
Part: 1/1

FileMagic.Console/Program.cs

@@ -55,7 +55,7 @@ static int Main(string[] args)
                 {
                     if (!File.Exists(customMagic))
                     {
-                        TextWriterColor.WriteColor($"The custom magic database file {path} doesn't exist.", ConsoleColors.Red);
+                        TextWriterColor.WriteColor($"The custom magic database file {customMagic} doesn't exist.", ConsoleColors.Red);
                         return 3;
                     }
                 }