Version Range Automatic Updates
Set the version for the desired package in the Catalog source to a comparison string, like  ">=3.0, <3.6", to restrict the automatic updates to the version range. Any new version of the extension released in the catalog within this range will be automatically applied.
Example:
apiVersion: olm.operatorframework.io/v1
kind: ClusterExtension
metadata:
  name: argocd
spec:
  namespace: argocd
  serviceAccount:
    name: argocd-installer
  source:
    sourceType: Catalog
    catalog:
      packageName: argocd-operator
      version: ">=3.0, <3.6"  # Install versions from v3.0.0 up to, but not including, v3.6.0
For more information on SemVer version ranges see version-ranges