Update Toolkit examples to follow latest Reference Architecture updates

What does this MR do?

Updating examples to follow latest Reference Architecture updates:

• Update Load Balancer sizing in Ref Arch docs (gitlab!145436 - merged)
• Update 20 RPS / 1k user requirements with a rec... (gitlab!149528 - merged)
• Adjust Reference Architecture Cloud Native Webs... (gitlab!149878 - merged)

Author's checklist

When ready for review, the Author applies the workflowready for review label and mention @gl-quality/get-maintainers:

• Merge request:
  • Merge Request Title and Description are up-to-date, accurate, and descriptive
  • MR targeting the appropriate branch
  • MR has a green pipeline
  • MR has no new security alerts in the widget from the Secret Detection and IaC Scan (SAST) jobs.