Mark 3.14 PEPs as Final

Here's the accepted PEPs targeting 3.14 which made the beta feature freeze:

• PEP-739 build-details.json 1.0 — a static description file for Python build details @FFY00
  https://github.com/python/peps/pull/4629
• PEP-749 Implementing PEP 649 @JelleZijlstra (let's also update PEP-649)
• PEP-750 Template Strings - let's wait until it's documented (python/cpython#132661 / t-strings/help#2)
• PEP-758 Allow except and except* expressions without parentheses @pablogsal @brettcannon
• PEP-768 Safe external debugger interface for CPython @pablogsal @godlygeek @ivonastojanovic
• PEP-779 Criteria for supported status for free-threaded Python @Yhg1s @mpage @colesbury

Please can the authors read the "Mark as Final" checklist then open PRs to update the status?

Thank you!

See also:

• https://github.com/python/peps/issues/3781
• https://github.com/python/peps/issues/3817

Comienza con la lista de comprobación vinculada “Mark as Final” en .github/PULL_REQUEST_TEMPLATE/Mark a PEP as Final.md y, después, revisa las páginas de los PEP vinculadas y sus estados actuales. Confirma qué PEP aceptados están listos, incluida la dependencia de documentación de PEP-750, y actualiza los estados de los PEP relevantes mediante pull requests separadas, tal como se solicita.