Use released nfs-volume 7.60.0 (#419)

Co-authored-by: Matthias Vach <matthias.vach@sap.com>

Author: c0d1ngm0nk3y

helmfile.yaml.gotmpl

@@ -406,6 +406,7 @@ releases:
   - name: nfs-volume
     namespace: {{ .Values.systemNamespace }}
     chart: {{ .Values.charts.nfsVolume.url }}
+    version: {{ .Values.charts.nfsVolume.version }}
     installed: {{ .Values.installOptionalComponents }}
     needs:
       - capi