Invalid filename prevents cloning on Windows

[whitey09byte]

The file NASA_Image_Extraction/Astro_Images/2022-11-25_NGC 6744: Extragalactic Close-Up.mp3
contains ":" which is not allowed in Windows filenames and prevents checkout.

[tamas2006]

Hi @whitey09byte! This looks like a great clean-up task for a first contribution. Can I take this on? I'll rename the file to remove the colon and check for any broken internal references.