DOCS-2386: Update security events docs

[ctauchen]

Added some missed updates to CE version. Fixed an outdated
prerequisite in CC version.

DOCS-2386

Product Version(s):

Issue:

Link to docs preview:

https://deploy-preview-2279--tigera.netlify.app/calico-enterprise/3.22/threat/security-event-management

SME review:

• An SME has approved this change.

DOCS review:

• A member of the docs team has approved this change.

Additional information:

Merge checklist:

• Deploy preview inspected wherever changes were made
• Build completed successfully
• Test have passed

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