# apt-get update 
Stary:1 http://ports.ubuntu.com jammy InRelease
Stary:2 http://ports.ubuntu.com jammy-security InRelease
Stary:3 http://ports.ubuntu.com jammy-updates InRelease                        
Stary:4 http://ports.ubuntu.com jammy-backports InRelease                      
Ign:5 https://apt.armbian.com jammy InRelease      
Ign:5 https://apt.armbian.com jammy InRelease      
Ign:5 https://apt.armbian.com jammy InRelease
Błąd:5 https://apt.armbian.com jammy InRelease
  500  Internal Server Error [IP: 107.175.134.226 443]
Czytanie list pakietów... Gotowe
W: Nie udało się pobrać https://apt.armbian.com/dists/jammy/InRelease  500  Internal Server Error [IP: 107.175.134.226 443]
W: Nie udało się pobrać niektórych plików indeksu, zostały one zignorowane lub użyto ich starszej wersji.

i cant update my armbian

uname -a

 5.15.43-sunxi #22.05.1 SMP Sat May 28 08:17:47 UTC 2022 armv7l armv7l armv7l GNU/Linux

Have the same issue here

Put https://apt.armbian.com in a web browser and tell us what mirror it uses.  When I do this the URL changes to https://armbian.systemonachip.net/apt/.  IT looks like the mirror you're being redirected to is experiencing problems and hopefully the system admin of that web server will spot this soon and correct it.