rudimentary filename format filtering

Program.cs

@@ -28,6 +28,11 @@
                         {
                             ext = probableFilename.Substring(probableFilename.LastIndexOf('.'));
                         }
+                        foreach(char c in "'\":\\?/")
+                        {
+                            title = title.Replace(c, ' ');
+                        }
+
 
                         Console.WriteLine($"{title}, {attachmentLink}");
                         var downloadPath = Path.Combine(feed.OutputDir, title + ext);