Fixed syntax errors of tpl function

helm/template/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 name: template
 description: A Helm library chart containing common templates, keeping application templates short
 type: library
-version: 0.1.20
+version: 0.1.21
 maintainers:
   - name: Jim Martens
     url: https://2martens.de
@@ -10,8 +10,8 @@ sources:
   - https://git.2martens.de/2martens/cloud-configuration
 annotations:
   artifacthub.io/changes: |
-    - kind: changed
-      description: Added support for Prometheus operator with pod monitor
+    - kind: fixed
+      description: Fixed syntax error
   artifacthub.io/signKey: |
     fingerprint: F0F153B65BAD467201D7544E47393ABD1F96B7C8
     url: https://mafiasi.de/pks/key/47393ABD1F96B7C8.asc

helm/template/templates/_podmonitor.yaml

@@ -4,7 +4,7 @@ apiVersion: monitoring.coreos.com/v1
 kind: PodMonitor
 metadata:
   name: {{ include "template.fullname" . }}
-  namespace: {{ tpl .Values.prometheus.namespace . | default "observability" }}
+  namespace: {{ tpl (quote .Values.prometheus.namespace) . | default "observability" }}
   labels:
     {{- include "template.labels" . | nindent 4 }}
 spec: