Actually the url link is right, but
When Ros is trying to upgrade using "check updates" x86 architecture is trying to download the file without x86 in filename
For arm64 the file name is routeros-7.1.2-arm64.npk
Not the right way of routeros-arm64-7.1.2.npk

Check for upgrade on ver 7.1.1 on a x86 architecture show version 7.1.2 is available but can not download as it is trying to download routeros-7.1.2.npk and correct file is routeros-x86-7.1.2.npk

Consist file naming is required throughout different architectures

Bug in ROS 6.44 [admin@MikroTik] > log print 09:00:29 system,info installed system-6.44 09:00:29 system,info installed advanced-tools-6.44 09:00:29 system,info installed multicast-6.44 09:00:29 system,info installed ntp-6.44 09:00:29 system,info installed routing-6.44 09:00:29 system,error can not i...

BUG in 6.44 Stable
We use these individual packages and get this error on install
09:00:29 system,error can not install security-6.44: dhcp-6.44 is not installed, but is required