fix: the required state output logic in the openopi reference doc

[HyeockJinKim]

resolves #3447 (BA-514)

Checklist: (if applicable)

• Milestone metadata specifying the target backport version
• Mention to the original issue
• Installer updates including:
  • Fixtures for db schema changes
  • New mandatory config options
• Update of end-to-end CLI integration tests in ai.backend.test
• API server-client counterparts (e.g., manager API -> client SDK)
• Test case(s) to:
  • Demonstrate the difference of before/after
  • Demonstrate the flow of abstract/conceptual models with a concrete implementation
• Documentation
  • Contents in the docs directory
  • docstrings in public interfaces and type annotations

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.66%. Comparing base (76f646c) to head (ae9e7f2).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3473   +/-   ##
=======================================
  Coverage   56.66%   56.66%           
=======================================
  Files         384      384           
  Lines       53702    53702           
=======================================
  Hits        30428    30428           
  Misses      23274    23274           

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[HyeockJinKim]

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