[Basic] Use nullptr instead of NULL (NFC)#166008

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

kazutakahirata:cleanup_20251101_clang_tidy_modernize-use-nullptr_AVRkazutakahirata/llvm-project:cleanup_20251101_clang_tidy_modernize-use-nullptr_AVRCopy head branch name to clipboard