Bump Dependencies/Luau from 8b510d3 to fff897a

Bumps [Dependencies/Luau](https://github.com/roblox/luau) from `8b510d3` to `fff897a`.
- [Release notes](https://github.com/roblox/luau/releases)
- [Commits](luau-lang/luau@8b510d3...fff897a)

---
updated-dependencies:
- dependency-name: Dependencies/Luau
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>