Yes, that will work. As part of running `apt upgrade`, the package base-files will get upgraded from 10.3+deb10u5 to 10.3+deb10u6 which will update /etc/debian_

Yes, that will work. As part of running `apt upgrade`, the package base-files will get upgraded from 10.3+deb10u5 to 10.3+deb10u6 which will update /etc/debian_version to say 10.6 instead of 10.5.