@Milad4141aa: The Galaxy A05 is eligible to receive two generations of OS upgrades and four years of security updates. For further information, please take a look at the link below.
https://news.samsung.com/my/samsung-galaxy-a05-and-a05s-the-ultimate-long-lasting-phone
Hi @Milad4141aa Welcome to the community 
The A05 is indeed elegible for 2 os updates and 4 years of security updates. Therefore it will be updated to Android 15. https://www.androidupdatetracker.com/p/samsung-galaxy-a05
But in picture 4 year update do 4 os update?
