broken link at README.md

[PabloFMM]

.hyp Format
Binary format bundling blueprint + assets:

[4 bytes: header size (uint32 LE)]
[JSON header: blueprint + asset manifest]
[asset data concatenated]
See: .hyp format spec

https://github.com/hyperfy-xyz/hyperfy/blob/5d20037435a1d86cda088382bb12737e9f18d5f6/docs/supported-files/hyp-format.md?plain=1#L4