[ADT] Fix a comment typo in SmallPtrSet (NFC)#152565

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

kazutakahirata:cleanup_20250807_SmallPtrSet_typokazutakahirata/llvm-project:cleanup_20250807_SmallPtrSet_typoCopy head branch name to clipboard