Merge branch '1194-pvc-deletion-in-restore-instructions' into 'main'

Resolve "PVC deletion in restore instructions"

Closes #1194

See merge request stackspin/stackspin!905

docs/maintenance.rst

@@ -104,6 +104,7 @@ the following commands:
    flux suspend kustomization $app
    flux suspend helmrelease -n stackspin-apps $app
    kubectl delete all -n stackspin-apps -l stackspin.net/backupSet=$app
+   kubectl delete pvc -n stackspin-apps -l stackspin.net/backupSet=$app
    velero restore create arbitrary-name-of-restore-operation --from-backup=$backup -l stackspin.net/backupSet=$app
    # At this point, please first wait for the restore operation to finish, see
    # text below.