📖 docs: correct typo in migration guide

[Gearheads]

Summary

This PR will update the documentation to correct a typo that was found within the migration_guide_gov3_to_gov4.md doc.

Fixes #4014

Please let me know if anything else needs to be correct. 😄

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[camilamacedo86]

/lgtm

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: camilamacedo86, Gearheads

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[camilamacedo86]

/ok-to-test