fix: update to_string_view function for fmt 11.1 (#3301)

Signed-off-by: Rui Chen <rui@chenrui.dev>

include/spdlog/common.h

@@ -365,10 +365,17 @@ SPDLOG_CONSTEXPR_FUNC spdlog::wstring_view_t to_string_view(spdlog::wstring_view
 #endif
 
 #ifndef SPDLOG_USE_STD_FORMAT
+#if FMT_VERSION >= 110100
+template <typename T, typename... Args>
+inline fmt::basic_string_view<T> to_string_view(fmt::basic_format_arg<T> fmt) {
+    return fmt;
+}
+#else
 template <typename T, typename... Args>
 inline fmt::basic_string_view<T> to_string_view(fmt::basic_format_string<T, Args...> fmt) {
     return fmt;
 }
+#endif
 #elif __cpp_lib_format >= 202207L
 template <typename T, typename... Args>
 SPDLOG_CONSTEXPR_FUNC std::basic_string_view<T> to_string_view(