update backup password

infrastructure/backup/base/cronjob.yaml

@@ -21,10 +21,14 @@ spec:
             command: ["curl"]
             args:
               - "-H"
-              - "Title: $(cat /proc/sys/kernel/hostname)"
+              - "Title: $OPERATION"
               - "-d"
-              - "Restic operation to gdrive finished"
+              - "Finished successfully"
               - "https://ntfy.kluster.moll.re/backup"
+            env:
+              - name: OPERATION
+                value: "PLACEHOLDER"
+
           initContainers:
           - name: restic-base-container
             image: restic/restic:latest