Clarify Epic API deprecation and link to migration guides

Nicolas Dularrequested to merge
nd/clarify-epic-api into master

What does this MR do and why?

  • Removes the 18.0 release that was not correct anymore
  • Adds the link to the GraphQL API docs for better discoverability

References

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Screenshot_2025-05-29_at_12.01.24

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