[clang] [clang][deps] Add a release note for fixing crashes in `clang-scan-deps`. (PR #149857)

[Aaron Ballman via cfe-commits]

AaronBallman wrote:

> Do you mean cherry-picked into LLVM-21? I can see the fix in llvmorg-21.1.0-rc1 and llvmorg-22-init, and expect the documentation to be present for llvm-22 automatically.

Correct, cherry-picked into the 21.x branch. The fix is in 21 but the release note is missing from it unless we cherry-pick this after it lands.

Btw, documentation build failure is unrelated.

https://github.com/llvm/llvm-project/pull/149857