Nav changes: Update nav references for all "AI for Security", "Dashboard", and "Cloud Security" pages

[benironside]

Description

Sub issue of #5896 — update navigation language in pages I'm responsible for
Enumerated here: https://docs.google.com/spreadsheets/d/19l2UUeLaa8NAPG2zotVUhAlo_ox62cD5qrRgoiZv5o0/edit?gid=0#gid=0

Background & resources

• PRs:
• Issues/metas:
• Point of contact:
• Test environments:

Which documentation set does this change impact?

ESS and serverless

ESS release

8.16

Serverless release

Feature differences

API docs impact

Prerequisites, privileges, feature flags

No response