Merge pull request #89 from projectsyn/doc/upgrade-v5.x

Add Documentation for migrating to v5.x

Author: DebakelOrakel

docs/modules/ROOT/pages/how-tos/upgrade-4.x-to-5.x.adoc

@@ -0,0 +1,11 @@
+= Upgrade from 4.x to 5.x
+
+This guide describes the steps to perform an upgrade of the component from version 4.x to 5.x.
+
+== Migration guide
+
+This release requires Kubernetes VolumeSnapshot CRDs and the external snapshot controller to be installed before installing or upgrading this driver.
+Clusters without these components must install them first.
+Otherwise, snapshot-related operations and the snapshot resource in the Helm chart will fail to work.
+
+See https://github.com/cloudscale-ch/csi-cloudscale/blob/master/CHANGELOG.md#v400---20260330[Cloudscale CSI Changelog].

docs/modules/ROOT/partials/nav.adoc

@@ -4,6 +4,7 @@
 * xref:how-tos/upgrade-1.x-to-2.x.adoc[Upgrade 1.x to 2.x]
 * xref:how-tos/upgrade-2.x-to-3.x.adoc[Upgrade 2.x to 3.x]
 * xref:how-tos/upgrade-3.x-to-4.x.adoc[Upgrade 3.x to 4.x]
+* xref:how-tos/upgrade-4.x-to-5.x.adoc[Upgrade 4.x to 5.x]
 
 .Technical reference
 * xref:references/parameters.adoc[Parameters]