[1pt] Fix formatting in Release Notes

[NickVolynkin]

Fix formatting in Release Notes

Follow-up of #1914

Reviewer: @ documentarian name

Definition of done

• fix indents, bad code blocks and other migration artifacts
• bring document headings to consistency: "Tarantool x.y.z"
• add 1.10.5 to 9 to the TOC.

Planning checklist

• Pick label:
  • CI/CD
  • localization
  • or others.
• Estimate complexity in storypoints in the title
• Add to Documentation board → Backlog

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