fix: Missing comma in config.py

[mrshu]

Description of Change

• Fix missing comma

Checklist

I believe this is a minimal change

Release Notes

Notes: none.

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[miniak]

@nornagon the comma was lost in #32540

[codebytere]

Unrelated failure - merging.

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[release-clerk]

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[trop]

I have automatically backported this PR to "15-x-y", please check out #32676

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I have automatically backported this PR to "16-x-y", please check out #32677

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I have automatically backported this PR to "17-x-y", please check out #32678