fix(jest-cli): fix typo in options when spawning coverage workers

[dlmr]

Summary
Fixes a typo in the options when spawning coverage workers. This change does not change the behaviour of the code as there is a fallback in jest-worker that resolves to the same method. https://github.com/facebook/jest/blob/master/packages/jest-worker/src/index.js#L95

Test plan
Matches the expected option in jest-worker.

[codecov-io]

Codecov Report

Merging #5374 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #5374   +/-   ##
=======================================
  Coverage   61.33%   61.33%           
=======================================
  Files         205      205           
  Lines        6924     6924           
  Branches        3        4    +1     
=======================================
  Hits         4247     4247           
  Misses       2676     2676           
  Partials        1        1

Impacted Files	Coverage Δ
...ckages/jest-cli/src/reporters/coverage_reporter.js	66.14% <ø> (ø)	⬆️

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[cpojer]

We should probably add a test for this. Do you mind sending a follow-up PR for that?

[dlmr]

I can take a look at it, but no promises. 🙂

Is my assumption correct that this should be verified by Flow? Verifying that the options we pass in match FarmOptions which I assume we will need to hoist into the general types folder?

[github-actions]

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