Update victoriametrics/vmalert Docker tag to v1.104.0

Author: renovate-bot

apps/monitoring/vmalert/deployment.yaml

@@ -36,7 +36,7 @@ spec:
           type: RuntimeDefault
       containers:
         - name: vmalert
-          image: victoriametrics/vmalert:v1.103.0
+          image: victoriametrics/vmalert:v1.104.0
           imagePullPolicy: IfNotPresent
           ports:
             - containerPort: 8880