[lld] [ELF] Change build-id default to sha1 (PR #93943)

[Tatsuyuki Ishi via llvm-commits]

ishitatsuyuki wrote:

> Nit: the majority of commits in llvm-project omit the trailing full stop in the subject line

Removed full-stop.

https://github.com/llvm/llvm-project/pull/93943