fix: typo RayJobSubmitter in ray_job_submitter.py

[Peefy]

What changes were proposed in this pull request?

I discovered this error while browsing and learning the code, so I raised a PR to fix it

Why are the changes needed?

Typos in code can affect people's learning and use of it

Does this PR introduce any user-facing change?

Yes, this means that once people have used it in past versions, they also need to modify it together.

How was this patch tested?

Unit test in CI.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.46%. Comparing base (de6c5b1) to head (0c8f775).
Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1320   +/-   ##
=======================================
  Coverage   80.46%   80.46%           
=======================================
  Files         222      222           
  Lines       20740    20740           
=======================================
  Hits        16688    16688           
  Misses       4052     4052           

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