Translate c-api/conversion.po

[sofide]

This file is 63% translated and needs to reach 100%.

The rendered version of this file will be available at https://docs.python.org/es/3.13/c-api/conversion.html once translated.
Meanwhile, the English version is shown.

Current stats for c-api/conversion.po:

• Total entries: 33

• Entries that need work: 12 - (37%)

  • Fuzzy: 5
  • Untranslated: 7

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