increase game version notes to 30000 characters, because with all the…

… file hashes they can become quite large

TASVideos/Pages/Games/Versions/Edit.cshtml.cs

@@ -220,7 +220,7 @@ public class VersionEdit
 		[StringLength(50)]
 		public string? SourceDb { get; init; }
 
-		[StringLength(2000)]
+		[StringLength(30000)]
 		public string? Notes { get; init; }
 	}
 }