fix: fix miss makezero bug

[alingse]

1. Description

I was running github actions to run linter makezero for top github golang repos.

see issues alingse/go-linter-runner#1

and the github actions output https://github.com/alingse/go-linter-runner/actions/runs/9242659719/job/25425759865

====================================================================================================
append to slice `userIds` with non-zero initialized length at https://github.com/ovh/cds/blob/master/engine/api/migrate/migrate_organization.go#L40:13
append to slice `mods` with non-zero initialized length at https://github.com/ovh/cds/blob/master/engine/hooks/trigger_workflow.go#L88:13
====================================================================================================

1. Related issues
2. About tests
3. Mentions

@ovh/cds

[ovh-cds]

CDS Report build-cds#20626.0 ✘
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[ovh-cds]

CDS Report build-cds#20626.1 ✔
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• Build and Package Contrib Action ✔
• Build and Package Contrib Code Plugin ✔
• Build and Package Contrib Integrations ✔
• Build and Package Engine, Worker, CLI and Doc ✔
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• Build Debpacker ✔
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• Test CLI ✔
• Test Contrib ✔
• Test Engine ✔
• Test SDK ✔
• Test UI ✔

[ovh-cds]

CDS Report integration-cds#20626.1 ✔

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