Versions updated

[Grégoire Bellon-Gervais]

Hello,

I have updated versions in this pull request #173

Build have been tested on OpenShift 4.10.

Build images are available on if you want to try or better, build them:
https://quay.io/repository/docaposte/openshift-acme-controller
https://quay.io/repository/docaposte/openshift-acme-exposer

Have a nice day and thanks a lot for this work :)
@tnozicka