So the GitHub "long story" is a decade-long cycle of upload → DMCA → removal → repeat. No permanent, reliable host exists there for copyright reasons.
If you just need a BIOS for PCSX2, download the emulator and use their auto-updater (it doesn’t provide BIOS files, but guides you to dump yours). scph10000.bin github
I believe you're referring to the file, which is a BIOS dump for the original Japanese PlayStation 2 (model SCPH-10000). This BIOS file is required by emulators like PCSX2 to boot games. So the GitHub "long story" is a decade-long