feat(changelog): add new entry

Author: Changelog bot

changelog/october2025/2025-10-08-transactional-email-added-new-attachment-formats-are-no.mdx

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+---
+title: New attachment formats are now supported
+status: added
+date: 2025-10-08
+category: domains-and-webhosting
+product: transactional-email
+---
+
+This update allows sending emails with common audio (.wav, .mp3) and document file types (.doc, .docx).
+
+Check the full list of supported file extensions in the [supported file types documentation].
+link -> https://www.scaleway.com/en/docs/transactional-email/reference-content/tem-capabilities-and-limits/#types-of-attachments-available
+