docs(k-m): add permission sets

pages/iam/reference-content/permission-sets.mdx

@@ -123,7 +123,8 @@ Below is a list of the permission sets available at Scaleway.
 | SecretManagerSecretWrite     | Permission to edit the metadata (name, tags, description, etc.) of secrets and their versions in Secret Manager. Does not include permission to create secrets and versions           |
 | BlockStorageReadOnly         | List and read access to Block Storage                |
 | BlockStorageFullAccess       | Full access to create, read, list, edit and delete in Block Storage            |
-
+| KeyManagerFullAccess       | Full access to create, read, list, edit and delete in Key Manager           |
+| KeyManagerReadOnly       | List and read access to Key Manager            |
 
 <Message type="important">
   Some additional permission sets may appear on your Scaleway console if you are enrolled in beta testing for products or features.