Fix formatting in L3 rollup deployment instructions

[douglance]

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Description

Document type

• Gentle introduction
• Quickstart
• How-to
• Concept
• FAQ
• Troubleshooting
• Reference
• Third-party content
• Codebase changes
• Not applicable

Checklist

• I have read the CONTRIBUTE.md guidelines
• My changes follow the style conventions outlined in CONTRIBUTE.md
• I have used sentence-case for titles and headers
• I have used descriptive link text (not "here" or "this")
• I have separated procedural from conceptual content where appropriate
• I have tested my changes locally with yarn start or yarn build
• My code follows the existing code style and conventions
• I have added/updated frontmatter for new documents
• I have checked for broken links
• I have verified that my changes don't break the build
• Third-party docs only: Do you agree to the third-party content policy outlined within CONTRIBUTE.md?
  • Yes
  • Not applicable

Additional Notes

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Project	Deployment	Actions	Updated (UTC)
arbitrum-docs	Ready	Preview	Apr 22, 2026 3:04pm