Illegal Characters in Path

I ran into an issue where I specified an output directory (it exists), but for some reason when sharphound ran, it gave an "Illegal Characters in Path" error and died. Rohan said to file a bug and thinks it relates to the following code:

`public string ResolveFileName(string filename, string extension, bool addTimestamp)
{
var finalFilename = filename;
if (!filename.EndsWith(extension))
finalFilename = $"{filename}.{extension}";

        if (extension is "json" or "zip" && Flags.RandomizeFilenames)
            finalFilename = $"{Path.GetRandomFileName()}";

        if (addTimestamp) finalFilename = $"{CurrentLoopTime}_{finalFilename}";

        if (OutputPrefix != null) finalFilename = $"{OutputPrefix}_{finalFilename}";

        var finalPath = Path.Combine(OutputDirectory, finalFilename);

        return finalPath;
    }`

Start at the ResolveFileName method shown in the issue and reproduce the failure using an existing output directory. Trace how the filename, extension, timestamp, and OutputPrefix are combined before Path.Combine is called. Done means the same output-directory scenario completes without an Illegal Characters in Path error and preserves the intended output naming.