fix: correct multi-scene worlds deploy command

[decentraland-bot]

Summary

• Fix incorrect npm run deploy command for multi-scene worlds deployment
• The command was missing -- before the --multi-scene flag, which is required to pass arguments through npm run to the underlying script

Changes

creator/sdk7/publishing/publishing.md

• Before: npm run deploy -multi-scene --target-content https://worlds-content-server.decentraland.org
• After: npm run deploy -- --multi-scene --target-content https://worlds-content-server.decentraland.org

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🤖 Created via Slack with Claude
Requested by Alejandro Picazo via Slack