rancher: Increase memory requests and limits

Related to swh/infra/sysadm-environment#5316

argocd-configuration/applications/rancher/rancher-application.yaml

@@ -17,9 +17,9 @@ spec:
         replicas: 2
         resources:
           requests:
-            memory: 1Gi
+            memory: 1.5Gi
           limits:
-            memory: 1536Mi
+            memory: 2Gi
         ingress:
           extraAnnotations:
             cert-manager.io/cluster-issuer: letsencrypt-production-gandi