[OSDOCS-16532]: Bump HCP version from 4.19 to 4.20

[lahinson]

Version(s): 4.20+

Issue: https://issues.redhat.com/browse/OSDOCS-16532

Link to docs preview:

QE review:

• QE has approved this change.

Additional information: Do not merge until the ACM release in December.

[ocpdocs-previewbot]

🤖 Wed Oct 22 16:26:54 - Prow CI generated the docs preview:

https://100938--ocpdocs-pr.netlify.app/openshift-enterprise/latest/hosted_control_planes/hcp-deploy/hcp-deploy-aws.html
https://100938--ocpdocs-pr.netlify.app/openshift-enterprise/latest/hosted_control_planes/hcp-deploy/hcp-deploy-bm.html
https://100938--ocpdocs-pr.netlify.app/openshift-enterprise/latest/hosted_control_planes/hcp-deploy/hcp-deploy-ibm-power.html
https://100938--ocpdocs-pr.netlify.app/openshift-enterprise/latest/hosted_control_planes/hcp-deploy/hcp-deploy-ibmz.html
https://100938--ocpdocs-pr.netlify.app/openshift-enterprise/latest/hosted_control_planes/hcp-deploy/hcp-deploy-non-bm.html
https://100938--ocpdocs-pr.netlify.app/openshift-enterprise/latest/hosted_control_planes/hcp-deploy/hcp-deploy-openstack.html
https://100938--ocpdocs-pr.netlify.app/openshift-enterprise/latest/hosted_control_planes/hcp-disconnected/disconnected-install-ibmz-hcp.html
https://100938--ocpdocs-pr.netlify.app/openshift-enterprise/latest/hosted_control_planes/hcp-manage/hcp-manage-bm.html
https://100938--ocpdocs-pr.netlify.app/openshift-enterprise/latest/hosted_control_planes/hcp-manage/hcp-manage-non-bm.html
https://100938--ocpdocs-pr.netlify.app/openshift-enterprise/latest/hosted_control_planes/index.html

[openshift-ci]

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