Update grafana/promtail Docker tag to v3

Signed-off-by: Marcus Noble <github@marcusnoble.co.uk>

manifests/monitoring/promtail.yaml

@@ -216,7 +216,7 @@ spec:
       serviceAccountName: promtail
       containers:
         - name: promtail
-          image: "grafana/promtail:2.9.17@sha256:b28495fdab552b183428c5b5cebbf258231fc5f00be7724be2bc091ad21ac390"
+          image: "grafana/promtail:3.6.11@sha256:a761cb834cfaeee29745440d4884d6748f0a08d8f68928db1d707018c1dcfbe9"
           imagePullPolicy: IfNotPresent
           args:
             - "-config.file=/etc/promtail/promtail.yaml"

renovate.json

@@ -25,5 +25,11 @@
   },
   "argocd": {
     "managerFilePatterns": ["/manifests/_apps/.+\\.yaml$/"]
-  }
+  },
+  "packageRules": [
+    {
+      "matchCurrentValue": "/(latest|full)/",
+      "pinDigests": false
+    }
+  ]
 }