helm(minor): fix monitoring username not being in b64

helm/passbook/templates/prom-rules.yaml

@@ -118,7 +118,4 @@ spec:
         for: 1m
         labels:
           severity: testing
-        annotations:
-          summary: "Unapplied django migrations on {{$labels.connection}}"
-          description: "Django detected {{$value}} unapplied migrations on database {{$labels.connection}}"
 {{- end }}

helm/passbook/templates/secret.yaml

@@ -4,7 +4,7 @@ type: Opaque
 metadata:
   name: {{ include "passbook.fullname" . }}-secret-key
 data:
-  monitoring_username: monitor
+  monitoring_username: bW9uaXRvcg== # monitor in base64
   {{- if .Values.config.secret_key }}
   secret_key: {{ .Values.config.secret_key | b64enc | quote }}
   {{- else }}