Add examples for GuardDuty UpdateDetector.

[aemous]

Description of changes:

• Add examples for GuardDuty UpdateDetector.

Description of tests:

• Manually verified the example file against the style guide.
• Manually verified the example commands successfully execute.

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.38%. Comparing base (c4681b5) to head (ce8c696).
⚠️ Report is 49 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #10000      +/-   ##
===========================================
- Coverage    93.39%   93.38%   -0.01%     
===========================================
  Files          210      210              
  Lines        17052    17055       +3     
===========================================
+ Hits         15925    15927       +2     
- Misses        1127     1128       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[kdaily]

LGTM. Make sure to port to v2!