Readme need correction with regard to cert-manager version

[iamraj007]

Need to update Readme

Readme section mention if you have cert-manager 1.2.0 or above... compatibility of messaging-topology-operator-with-certmanager works very well but cert-manager highest version is 1.15 so is the documentation not correct or am i missing something?

below is extract from ReadMe:
If you have cert-manager 1.2.0 or above installed in your k8s cluster, and kubectl configured to access your running k8s cluster, you can then run the following command to install the Messaging Topology Operator

[Zerpet]

The minimum supported version of cert-manager is 1.2.0. It should also work with the latest 1.15 version too. The readme states:

If you have cert-manager 1.2.0 or above

Noting that any cert-manager version >= 1.2.0 is compatible.

[MirahImage]

To be extra clear, 15 > 2