objstorage: Fix autoscaling template issue

Refs. swh/infra/sysadm-environment#5164

swh/templates/objstorage/autoscaling.yaml

 {{ if .Values.objstorage.enabled -}}
 {{ range $objstorage_type, $deployment_config := .Values.objstorage.deployments }}
 {{- if and (or (not (hasKey $deployment_config "enabled")) (get $deployment_config "enabled"))
-           (hasKey $deployment_config "autoScale") -}}
+           (hasKey $deployment_config "autoScaling") -}}
 {{- include "swh.autoscale" (dict "serviceType"   ( print "objstorage-" $objstorage_type )
                                   "configuration" $deployment_config
                                   "Values"        $.Values) -}}