Update ghcr.io/miniflux/miniflux Docker tag to v2.2.13 (#535)

Co-authored-by: Renovate Bot <[email protected]>

Author: soerenschneider

apps/miniflux/deployment.yaml

@@ -34,7 +34,7 @@ spec:
         seccompProfile:
           type: RuntimeDefault
       containers:
-        - image: "ghcr.io/miniflux/miniflux:2.2.12"
+        - image: "ghcr.io/miniflux/miniflux:2.2.13"
           imagePullPolicy: "IfNotPresent"
           name: "miniflux"
           ports: