[clang-tools-extra][docs] Add "Potentially Breaking Changes" section to ReleaseNotes#158434

vbvictor merged 1 commit intollvm:mainllvm/llvm-project:mainfrom

vbvictor:add-breaking-changes-section-to-tools-extravbvictor/llvm-project:add-breaking-changes-section-to-tools-extraCopy head branch name to clipboard