docs(links): update to point to 4.0.0 tag (backport #1065)

[mergify]

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• Read the contributing guidelines
• Linked a relevant issue which this PR resolves
• Linked any other relevant issues, PR's, or documentation, if any
• Resolved all conflicts, if any
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Fixes: #

Description of the change:

This change adds allows the users to provide...

Motivation for the change:

This change is helpful because users may want to...

How to manually test:

1. Insert steps here...
2. ...

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This is an automatic backport of pull request #1065 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of ebd6602 has failed:

On branch mergify/bp/cryostat-v4.0/pr-1065
Your branch is up to date with 'origin/cryostat-v4.0'.

You are currently cherry-picking commit ebd6602.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   api/v1beta2/cryostat_types.go
	modified:   bundle/manifests/operator.cryostat.io_cryostats.yaml
	modified:   config/crd/bases/operator.cryostat.io_cryostats.yaml
	modified:   config/manifests/bases/cryostat-operator.clusterserviceversion.yaml

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   bundle/manifests/cryostat-operator.clusterserviceversion.yaml

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally