feat(ins): add information for eol api

Author: bene2k1

compute/instances/how-to/migrate-volumes-snapshots-to-sbs.mdx

@@ -28,6 +28,18 @@ This guide offers step-by-step instructions to migrate your volumes and snapshot
   - If you encounter an error about quota limitations during the migration process, [contact our support team](https://console.scaleway.com/support/tickets/create) for assistance.
 </Message>
 
+<Message type="important">
+  To ensure continued access to managing your volumes, you must [convert](/faq/blockstorage/#how-can-i-convert-a-block-storage-legacy-volume-into-a-block-storage-low-latency-volume) your **unified volumes and snapshots** into either **local** or **Block volumes** before the **end-of-life date of June 2nd, 2024**. After this date, unified volumes and snapshots will no longer be supported by any API.
+
+  ### Key migration deadlines:
+  - **April 30th:**
+    - Creation of new unified volumes via the Instance API will be disabled.
+    - Unified volumes will no longer be supported by the Block Storage API.
+  - **June 2nd:**
+    - Unified volumes and snapshots can no longer be managed via any API. Existing unified resources must be converted by this date to avoid loss of manageability.
+</Message>
+
+
 <Macro id="requirements" />
 
 - A Scaleway account logged into the [console](https://console.scaleway.com)
@@ -223,4 +235,4 @@ This guide offers step-by-step instructions to migrate your volumes and snapshot
 
 To learn more about managing your migrated Block Storage volumes and snapshots from the Scaleway console, refer to the [Block Storage Quickstart Guide](/storage/block/quickstart/). Additionally, you can explore advanced features using the [Scaleway Block Storage API](https://www.scaleway.com/en/developers/api/block/).
 
-If you encounter any issues during migration, contact [Scaleway's support team](https://console.scaleway.com/support/tickets) for assistance.
+If you encounter any issues during migration, contact [Scaleway's support team](https://console.scaleway.com/support/tickets) for assistance.