feat(changelog): add new entry

Author: Changelog bot

changelog/june2025/2025-06-19-environmental-footprint-added-discover-the-environmenta.mdx

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+---
+title: Discover the environmental impact of your instances now! 🌍
+status: added
+date: 2025-06-19
+category: billing
+product: environmental-footprint
+---
+
+Our Environmental Footprint Calculator now supports Instances!
+Designed to go beyond simple accounting, it provides real usage-based impact metrics, covering both CO₂ emissions and water consumption.
+This multi-criteria approach helps you understand, compare and reduce the footprint of your cloud infrastructure. [Get my Impact report](https://console.scaleway.com/environmental-footprint.)
+