I've used for germination a very small pot (i...

No, don’t up pot her. Why do you need to right now>? Just curious, not giving attitude. If you disturb that immature, fragile root system by transplanting you will kill the seedling. If you do less than that and only stress it, you will stunt her at a point in growth that can have large, negative impacts later on in your grow. Unless that sucker has a super established root system and easily comes out of that pot, it’s not time to transplant. I root seeds in the same size container in your photos thru at least week 4 from germination. Once I see a solid, healthy, consolidated root mass thru the bottom of the container I feel confident transplanting won’t result in any transplant shock or stress that’s beyond baseline. Good luck