ffmpeg install must be written as "FFmpeg" on linux

[ethan-xd]

becuase linux is case sensitive, i was stuck using this package because i didnt realize that it needed to be FFmpeg, not ffmpeg. ideally it shouldnt matter what the capitalization is.

i was able to run the script with it finding ffmpeg fine when i changed the variable to lowercase

https://github.com/UhhhAaron/GIF-Caption-Creator/blob/master/Scripts/Main/Packages_Location/FFmpeg.pyw