[clang] [Clang] [Sema] Don't crash on unexpanded pack in invalid block literal (PR #110762)

[via cfe-commits]

Sirraide wrote:

> C/C++ code formatter, clang-format found issues in your code

... I don’t think I changed anything about that include? Or did it just reorder them because I added one? :thinking: 

https://github.com/llvm/llvm-project/pull/110762