feat(changelog): add new entry (#4299)

Co-authored-by: Changelog bot <[email protected]>

Author: ofranc

changelog/january2025/2025-01-28-iam-added-iam-auto-generated-resources-are-available-fo.mdx

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+---
+title: IAM auto-generated resources are available for Kubernetes clusters
+status: added
+author:
+    fullname: 'Join the #iam channel on Slack.'
+    url: 'https://slack.scaleway.com'
+date: 2025-01-28
+category: security-identity
+product: iam
+---
+
+Auto-generated groups and policies are now automatically created and deleted whenever a Kubernetes cluster is created or deleted.
+
+Refer to the [auto-generated IAM resources documentation](https://www.scaleway.com/en/docs/iam/reference-content/auto-generated-iam-ressources) for more information. For each creation or deletion of an auto-generated IAM resource, a log will appear on the IAM logs tab.
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