Fix the --force restart

[mimischi]

Resolves #141.

Changes made in this pull request:

• Found a typo that prohibited forced restarts of benchmarks.

PR Checklist

• Added changelog fragment in ./changelog/ (more information)?
• Issue raised/referenced?

[mimischi]

This really should have been catched by a unit test, but our current code structure needs mocking of detect_md_engine() and this is where the error actually arises.

[codecov]

Codecov Report

Merging #146 into develop will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff            @@
##           develop     #146   +/-   ##
========================================
  Coverage    95.86%   95.86%           
========================================
  Files           14       14           
  Lines          750      750           
========================================
  Hits           719      719           
  Misses          31       31

Impacted Files	Coverage Δ
mdbenchmark/submit.py	100% <100%> (ø)	⬆️

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