[libc++][NFC] Fixed some wrongly spelled `_LIBCPP_STD_VER` in comments#147008

philnik777 merged 1 commit intollvm:mainllvm/llvm-project:mainfrom

H-G-Hristov:hgh/libcxx/fixed-some-comments-__LIBCPP_STD_VERH-G-Hristov/llvm-project:hgh/libcxx/fixed-some-comments-__LIBCPP_STD_VERCopy head branch name to clipboard