chore: don't keep all old replica sets

ente/resources/cast/deployment.yaml

@@ -5,6 +5,7 @@ metadata:
   name: cast
 spec:
   replicas: 2
+  revisionHistoryLimit: 3
   selector:
     matchLabels:
       app.kubernetes.io/name: cast

ente/resources/museum/deployment.yaml

@@ -4,6 +4,7 @@ metadata:
   name: museum
 spec:
   replicas: 2
+  revisionHistoryLimit: 3
   selector:
     matchLabels:
       app.kubernetes.io/name: museum

ente/resources/photos/deployment.yaml

@@ -5,6 +5,7 @@ metadata:
   name: photos
 spec:
   replicas: 2
+  revisionHistoryLimit: 3
   selector:
     matchLabels:
       app.kubernetes.io/name: photos