Update indentation of new postfix prometheus rules

ansible/host_vars/lovelace/prometheus.yml

@@ -141,25 +141,25 @@ prometheus_rules: |
           summary: Too many deadlocked tables
           description: "PostgreSQL has dead-locks, value: {{ $value }}"
 
-  - name: postfix
-    rules:
-      - alert: postfix/down
-        expr: postfix_up != 1
-        for: 5m
-        labels:
-          severity: warning
-        annotations:
-          summary: Postfix is down (instance {{ $labels.instance }})
-      - alert: postfix/smtp-temporary-errors
-        expr: rate(postfix_smtpd_messages_rejected_total{code=~"^4.*"}[15m]) > 0
-        for: 0m
-        labels:
-          severity: warning
-        annotations:
-          summary: Postfix is rejecting messages due to errors (instance {{ $labels.instance }})
-          description: Postfix has seen code {{ $labels.code }} errors recently
-            and temporarily rejected emails.
-            https://en.wikipedia.org/wiki/List_of_SMTP_server_return_codes and
-            `sudo journalctl -xeu postfix@-` may provide more information on
-            the current issue.
+    - name: postfix
+      rules:
+        - alert: postfix/down
+          expr: postfix_up != 1
+          for: 5m
+          labels:
+            severity: warning
+          annotations:
+            summary: Postfix is down (instance {{ $labels.instance }})
+        - alert: postfix/smtp-temporary-errors
+          expr: rate(postfix_smtpd_messages_rejected_total{code=~"^4.*"}[15m]) > 0
+          for: 0m
+          labels:
+            severity: warning
+          annotations:
+            summary: Postfix is rejecting messages due to errors (instance {{ $labels.instance }})
+            description: Postfix has seen code {{ $labels.code }} errors recently
+              and temporarily rejected emails.
+              https://en.wikipedia.org/wiki/List_of_SMTP_server_return_codes and
+              `sudo journalctl -xeu postfix@-` may provide more information on
+              the current issue.
   {% endraw %}