Fix highstate duration alignment (again)

[anlutro]

Followup to #25653 - correcting my mistakes.

Honestly, I'm not sure why it worked previously.

Sample output:

$ salt-ssh '*' state.highstate
Summary for vagrant-dev
-------------
Succeeded: 75
Failed:     0
-------------
Total states run:     75
Total run time:  627.733 ms

Summary for vagrant-test
--------------
Succeeded: 115
Failed:      0
--------------
Total states run:     115
Total run time:     2.153 s

Summary for vagrant-test2
--------------
Succeeded: 116
Failed:      0
--------------
Total states run:     116
Total run time:    12.137 s

[jfindlay]

Thanks, @anlutro.