fix compile error again with wchar formatting

include/spdlog/logger.h

@@ -241,7 +241,7 @@ public:
             // format to wmemory_buffer and convert to utf8
 
             fmt::wmemory_buffer wbuf;
-            fmt::format_to(std::back_inserter(wbuf), fmt::runtime(fmt), std::forward<Args>(args)...);
+            fmt::format_to(std::back_inserter(wbuf), fmt, std::forward<Args>(args)...);
 
             memory_buf_t buf;
             details::os::wstr_to_utf8buf(wstring_view_t(wbuf.data(), wbuf.size()), buf);