[clang] [Sema]Substitue parameter packs when deduced from function parameter (PR #79371)

[Erich Keane via cfe-commits]

https://github.com/erichkeane commented:

I don't see the release note, and there is a typo in the PR entry that should be fixed.

Else just 1 nit.

https://github.com/llvm/llvm-project/pull/79371