The channel information is a separate module  [1]. However it is making `updating-cluster-between-minor` doc more about channels but it should be more about updating between minor versions.

Also between  [2][3] and  [4] there are lots of repetition of text which we should reduce and improve the experience.

Also it makes the doc long and impacts the readability negatively.

[1] https://github.com/openshift/openshift-docs/blob/main/modules/understanding-upgrade-channels.adoc

[2]https://docs.openshift.com/container-platform/4.8/updating/updating-cluster-between-minor.html

 [3]https://docs.openshift.com/container-platform/4.8/updating/updating-cluster.html

 [4]https://docs.openshift.com/container-platform/4.8/updating/updating-cluster-cli.html