chore(ci): fix gh workflow perm

[moul]

• Fails to create label when action runs googleapis/release-please-action#1105 (comment)
• https://github.com/gnolang/gno/actions/runs/16070868205/job/45354983989?pr=4410

[Gno2D2]

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[thehowl]

I fixed it creating the labels, but sounds good for next time.