[BUG] - slog.Any does not handle interfaces

[OrHayat]

{
....
	g := map[any]any{"a": 2, 1: true}
	logger := slog.New(handler)
	logger.LogAttrs(context.Background(), slog.LevelError, "test", slog.Any("test", g))
}

output:
ERROR test
M test: 2 map[interface {}]interface {}
1: Unknown type: interface
a: Unknown type: interface

expected output:
ERROR test
M test: 2 map[interface {}]interface {}
a: 2
1:true

[david-littlefarmer]

@noppawitt resolved it in #27. Thank you.