Uncomment output paths in snM3C wdl

[aawdeh]

Uncomment output paths in snM3C wdl

Checklist

If you can answer "yes" to the following items, please add a checkmark next to the appropriate checklist item(s) and notify our WARP documentation team by tagging either @ekiernan or @kayleemathews in a comment on this PR.

• Did you add inputs, outputs, or tasks to a workflow?
• Did you modify, delete or move: file paths, file names, input names, output names, or task names?
• If you made a changelog update, did you update the pipeline version number?

[github-actions]

Remember to squash merge!