Update Cryostat version to 2.2.0 when mentioning image catalog.

Review Upgrade notes from 2.0/2.1 to 2.2.0 (i.e. 2.2.0 capabilities -> Seamless Upgrades).

Recommend add a screenshot for operator install procedure step 3. Trying to remove as much OpenShift images as possible or reduce their size as the GUI is not controlled by the Cryostat team.

Update Figure 1.1, 1.2 to show operator 2.2.0. Between figure 1.3 and 1.4, there is a figure about YAML template without caption. Recommend procedure step 4ii (auto prompt) to have a screenshot and reduce duplication from previous (manual) step.

Recommend to have a screenshot for the verification section. Also, not sure on OCP console, we can see these condition set to true. I guess its name popping up in status column means true?

Update Figure 1.6, 1.7 to show the new status view (i.e. addition of grafana secret name).

Remove extra space before apiGroups in the default rbac manifest block (i.e. bottom of page). |http://example.com

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1. "The following container images exist for Cryostat 2.1" -> "...2.2" in Overview section.

2. The upgrade note under 1.2 section shows guide for 2.0 to 2.1. I wonder if there are any issues for 2.2.0 to note here. Sorry, that was meant to get opinions from Elliott. Any guide @ebaron@redhat.com?

-6. The very last code block. At the beginning, there is a tiny space before `apiGroups`. Right below this line: "The following YAML configuration demonstrates an apiGroups string with all the Cryostat-specific RBAC permissions defined".

Actually, from a second look, for 6, I think the format of the yaml is a little misaligned. Maybe, we make sure it is correctly formatted as here:
https://github.com/cryostatio/cryostat-operator/blob/0af4715645b6329eea4887420fcc79aa4b0e9b66/config/rbac/oauth_client.yaml