use better example of composite ID get in the knowledge command help

[pnickolov]

Description

Replace the knowledge get example of composite object ID to a concrete one that will return results.

Type of Change

• Bug Fix
• New Feature
• Breaking Change
• Refactor
• Documentation
• Other (please describe): usage help

Checklist

• I have read the contributing guidelines
• Existing issues have been referenced (where applicable)
• I have verified this change is not present in other open pull requests
• Functionality is documented
• All code style checks pass
• New code contribution is covered by automated tests
• All new and existing tests pass

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (2098ef4) 26.88% compared to head (90a598d) 26.88%.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #263   +/-   ##
=======================================
  Coverage   26.88%   26.88%           
=======================================
  Files          44       44           
  Lines        4564     4564           
=======================================
  Hits         1227     1227           
  Misses       3242     3242           
  Partials       95       95           

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