feat(changelog): add new entry

Author: Changelog bot

changelog/march2025/2025-03-17-transactional-email-added-tem-scale-plan-is-live.mdx

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+---
+title: TEM Scale Plan is Live!
+status: added
+date: 2025-03-17
+category: managed-services
+product: transactional-email
+---
+
+The new Scale Plan is now available, including 100K emails/month and a dedicated IP for optimal deliverability.
+
+Discover all details in our documentation → https://www.scaleway.com/en/docs/transactional-email/how-to/manage-tem-plans/
+
+Explore it now in your Console → https://console.scaleway.com/transactional-email/plans
+
+