fix(container): update image ghcr.io/druggeri/nut_exporter to v3.1.3

| datasource | package                       | from  | to    |
| ---------- | ----------------------------- | ----- | ----- |
| docker     | ghcr.io/druggeri/nut_exporter | 3.1.1 | 3.1.3 |

cluster/apps/monitoring/network-ups-tools/helm-release.yaml

@@ -42,7 +42,7 @@ spec:
           exporter:
             image:
               repository: ghcr.io/druggeri/nut_exporter
-              tag: 3.1.1
+              tag: 3.1.3
     service:
       main:
         type: LoadBalancer