Fix a typo in mpi controller log

[LuBingtan]

Signed-off-by: lubingtan lubingtan@126.com

What this PR does / why we need it:

Fix a typo in mpi controller.

Which issue(s) this PR fixes (optional, in Fixes #<issue number>, #<issue number>, ... format, will close the issue(s) when PR gets merged):
Fixes #

Checklist:

• Docs included if any changes are user facing

[aws-kf-ci-bot]

Hi @LuBingtan. Thanks for your PR.

I'm waiting for a kubeflow member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[gaocegege]

/lgtm
/approve
/ok-to-test

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gaocegege, LuBingtan

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[gaocegege]

Thanks for your contribution! 🎉 👍