Match the namespace logic with the block above

Signed-off-by: Richard Boldiš <richard@boldis.dev>

Author: Richardds

charts/nextcloud/templates/metrics-servicemonitor.yaml

@@ -21,7 +21,11 @@ spec:
   jobLabel: {{ .Values.metrics.serviceMonitor.jobLabel | quote }}
   namespaceSelector:
     matchNames:
-      - {{ .Release.Namespace }}
+      {{- if .Values.metrics.serviceMonitor.namespace }}
+      - {{ .Values.metrics.serviceMonitor.namespace | quote }}
+      {{- else }}
+      - {{ .Release.Namespace | quote }}
+      {{- end }}
   selector:
     matchLabels:
       app.kubernetes.io/name: {{ include "nextcloud.name" . }}