Continue on error with steps

[TonyCTHsu]

What does this PR do?
Fix invalid template where continue-on-error is a key for step but not job.

Change log entry
None.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.74%. Comparing base (d960f15) to head (768237c).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4622      +/-   ##
==========================================
- Coverage   97.77%   97.74%   -0.03%     
==========================================
  Files        1417     1417              
  Lines       86328    86327       -1     
  Branches     4349     4349              
==========================================
- Hits        84403    84382      -21     
- Misses       1925     1945      +20     

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[datadog-datadog-prod-us1]

Datadog Report

Branch report: tonycthsu/fix-junit
Commit report: 768237c
Test service: dd-trace-rb

✅ 0 Failed, 21260 Passed, 1377 Skipped, 3m 36.63s Total Time