[lld] [llvm] [llvm-readobj][COFF] Consistent PDBGUID Formatting (PR #94256)

[Reid Kleckner via llvm-commits]

https://github.com/rnk commented:

Looks good, sorry to bother with the nits, I just want to get it to a state that I can merge from the web UI.

https://github.com/llvm/llvm-project/pull/94256