message: Use ascii_to_lowercase()
diff: @@ -58,8 +58,7 @@ namespace vcpkg::Strings
  std::string::const_iterator case_insensitive_ascii_find(const std::string& s, const std::string& pattern)
  {
  - std::string pattern_as_lower_case;
  - std::transform(pattern.begin(), pattern.end(), back_inserter(pattern_as_lower_case), &details::tolower_char);
  + const std::string pattern_as_lower_case(ascii_to_lowercase(pattern));
  return search(s.begin(), s.end(), pattern_as_lower_case.begin(), pattern_as_lower_case.end(), [](const char a, const char b)
  {
  return details::tolower_char(a) == b;
  