Update Cert Manager Version to 1.7.0

[Brad McCoy]

Update cert-manager version to 1.7.0

This is to be updated in 2 repos

1. https://github.com/bradmccoydev/argo-demo
2. https://github.com/ortelius/ortelius-kubernetes

Follow the contributing guide in the mentoring repo for the PR. PR's will not be accepted if you do not follow the guide. eg branch away from main, sign commits etc.

All you need to do is change the version number and nothing else. Line 3 and on the following path:
kube-infra/kustomize/dns-infra/cert-manager/base/kustomization.yaml

Reference to Artifacthub: https://artifacthub.io/packages/helm/cert-manager/cert-manager?modal=install

[Brad McCoy]

So you are changing 1.6.1 to 1.7.0

[Vrukshali Torawane]

I have made the mentioned changes! @bradmccoydev