[clang] [clang] fix sema init crashing on initialization sequences (PR #98102)

[Yuxuan Chen via cfe-commits]

yuxuanchen1997 wrote:

> The changes LGTM, but please add a release note to clang/docs/ReleaseNotes.rst so users know about the fix.

Added. Thanks. 

https://github.com/llvm/llvm-project/pull/98102