message: Fix comment for upgrading snmalloc
diff: @@ -256,8 +256,8 @@ if("virtual" IN_LIST COMPILE_TARGETS)
  set(SNMALLOC_CPP)
  else()
  - # Remove once we upgrade to snmalloc 0.5.4
  set(SNMALLOC_ONLY_HEADER_LIBRARY ON)
  + # Remove the following two lines once we upgrade to snmalloc 0.5.4
  set(CMAKE_POLICY_DEFAULT_CMP0077 NEW)
  set(USE_POSIX_COMMIT_CHECKS off)
  add_subdirectory(3rdparty/snmalloc EXCLUDE_FROM_ALL)
  