Update grafana/promtail Docker tag to v3

manifests/gitea/gitea.yaml

@@ -43,7 +43,7 @@ spec:
       priorityClassName: critical
       containers:
       - name: git
-        image: gitea/gitea:1.26.0
+        image: gitea/gitea:1.25.5
         env:
         - name: APP_NAME
           value: "Git"

manifests/monitoring/promtail.yaml

@@ -216,7 +216,7 @@ spec:
       serviceAccountName: promtail
       containers:
         - name: promtail
-          image: "grafana/promtail:2.9.17"
+          image: "grafana/promtail:3.6.10"
           imagePullPolicy: IfNotPresent
           args:
             - "-config.file=/etc/promtail/promtail.yaml"