[llvm] Proofread MergeFunctions.rst#152444

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

kazutakahirata:cleanup_20250806_proofread_MergeFunctions.rstkazutakahirata/llvm-project:cleanup_20250806_proofread_MergeFunctions.rstCopy head branch name to clipboard