feat(changelog): add new entry

Author: Changelog bot

changelog/february2025/2025-02-11-key-manager-added-key-manager-is-in-general-availabilit.mdx

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+---
+title: Key Manager is in General Availability!
+status: added
+author:
+    fullname: ''
+    url: 'https://slack.scaleway.com'
+date: 2025-02-11
+category: security-identity
+product: key-manager
+---
+
+Scaleway Key Manager is a service that allows you to create, manage, and use cryptographic keys in a centralized and secure service.
+
+Key Manager helps organizations achieve secure key management by handling low-level and error-prone cryptographic details for you.
+
+Find out more about Key Manager in the [dedicated documentation](/key-manager/).
+