There is wrong version shown when installing the gitops on MicroShift 4.20 [1]

```
$ sudo subscription-manager repos --enable=gitops-1.16-for-rhel-9-$(uname -m)-rpms
```

It shows to enable the 1.16 repo, where that version is no longer supported. The latest supported is 1.18 version [2].

Please update it to the latest version. Also, there is wrong MicroShift version as well.

```
Prerequisites
-- You installed MicroShift version 4.16 or later.  <<<<<<<
-- You configured 250MB RAM of additional storage.
```

[1] https://docs.redhat.com/en/documentation/red_hat_build_of_microshift/4.20/html/installing_optional_rpm_packages/microshift-install-optional-rpms#microshift-installing-rpms-for-gitops_microshift-install-optional-rpm    
[2] https://access.redhat.com/product-life-cycles?product=Red%20Hat%20OpenShift%20GitOps

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