Update library/docker version from 27.5.1-dind to 28.1.1-dind

Author: GeorgianaElena

binderhub-service/values.yaml

@@ -119,7 +119,7 @@ ingress:
 dockerApi:
   image:
     repository: docker.io/library/docker
-    tag: "27.5.1-dind" # source: https://hub.docker.com/_/docker/tags
+    tag: "28.1.1-dind" # source: https://hub.docker.com/_/docker/tags
     pullPolicy: ""
     pullSecrets: []
   resources: {}