The choice of RAM for a laptop

Good day to all!
There is a laptop: https://market.yandex.ru/product/1729126212/spec?nid=54544&lr=195&track=char
I would like to add 8GB of RAM.
It is already present base:
Like it: https://www.dns-shop.ru/product/b62b60512bed3330/operativnaa-pamat-sodimm-hynix-hma81gs6afr8n-uh-8-gb/

Same in stock at the moment is not found. In connection with this question: what is the right model you can recommend that would stand up as a mother and worked together productively, Yes?

In PC components, knowledge is not deep, so touching base just in case. Judging by the forums there are all sorts of nuances.
Thanks in advance!