feat(helm): use latest stable docker registry version

Author: donch

.github/workflows/tests.yaml

@@ -302,7 +302,7 @@ jobs:
               exit 1
           fi
           ## Check repository status
-          if [ $(kubectl get repository docker.io-library-nginx -o json | jq '.status.phase') == '"NotReady"' ] ;
+          if [ $(kubectl get repository docker.io-library-nginx -o json | jq '.status.phase') == '"Ready"' ] ;
           then
               echo "Found repository"
           else

helm/kube-image-keeper/values.yaml

@@ -198,7 +198,7 @@ registry:
     # -- Registry image pull policy
     pullPolicy: IfNotPresent
     # -- Registry image tag
-    tag: "2.8.2"
+    tag: "2.8"
   # -- Number of replicas for the registry pod
   replicas: 1
   persistence: