fix(Logger): not selecting correct formatting library

Author: Yimura

include/AsyncLogger/Logger.hpp

@@ -1,5 +1,5 @@
 #pragma once
-#ifndef USE_FMT
+#if !defined(USE_FMT) && CXX_FORMAT_SUPPORT
     #include <format>
     #define FORMAT std::format
     #define VFORMAT std::vformat
@@ -73,4 +73,4 @@ namespace al
         auto capture = LogCapture(level, std::move(formatString.Location()));
         capture << VFORMAT(formatString.FormatString(), MAKE_FORMAT_ARGS(std::forward<Args>(formatArgs)...));
     }
-}
+}