uptime: accept hour or minute in pretty-print tests

[ChihweiLHBird]

up 1 hour is valid when the CI runner is up for an hour, but it broke test_uptime_pretty_print on CI.

Resolve #14260

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/tail/symlink (fails in this run but passes in the 'main' branch)
Skip an intermittent issue tests/tail/tail-n0f (fails in this run but passes in the 'main' branch)
Skipping an intermittent issue tests/cut/bounded-memory (passes in this run but fails in the 'main' branch)
Congrats! The gnu test tests/seq/seq-epipe is now passing!

[cakebaker]

Thanks!