Fixes

• 🐛 Fix support for unions when using Form. PR #13827 by @patrick91.

Docs

• ✏️ Fix grammar mistake in docs/en/docs/advanced/response-directly.md. PR #13800 by @NavesSapnis.
• 📝 Update Speakeasy URL to Speakeasy Sandbox. PR #13697 by @ndimares.

Translations

• 🌐 Add Ukrainian translation for docs/uk/docs/tutorial/response-model.md. PR #13792 by @valentinDruzhinin.
• 🌐 Add Ukrainian translation for docs/uk/docs/tutorial/security/index.md. PR #13805 by @valentinDruzhinin.
• ✏️ Fix typo in docs/ja/docs/tutorial/encoder.md. PR #13815 by @ruzia.
• ✏️ Fix typo in docs/ja/docs/tutorial/handling-errors.md. PR #13814 by @ruzia.
• ✏️ Fix typo in docs/ja/docs/tutorial/body-fields.md. PR #13802 by @ruzia.
• 🌐 Add Russian translation for docs/ru/docs/advanced/index.md. PR #13797 by @NavesSapnis.

Internal

• ⬆ [pre-commit.ci] pre-commit autoupdate. PR #13823 by @pre-commit-ci[bot].