Update documentation

[michael-valdron]

Description of Changes

Summarize the changes you made as part of this PR.

Updates documentation with up to date cluster support information and known issue devfile/api#1626 information.

Related Issue(s)

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Acceptance Criteria

Tests

• Test Coverage
  • Are your changes sufficiently tested, and are any applicable test cases added or updated to cover your changes?
• Gosec scans
  • Fix all MEDIUM and higher findings and/or annotate a finding per gosec instructions: https://github.com/securego/gosec#annotating-code to address why a finding is not a security issue

Documentation

• Does the registry operator documentation need to be updated with your changes?

Tests Performed

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How To Test

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Running Unit Tests

Running Integration Tests

Notes To Reviewer

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[thepetk]

/lgtm

[Jdubrick]

lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Jdubrick, michael-valdron, thepetk

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