docs: Fix aggregation guide discrepancies

[deanm0000]

addresses #17858

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.50%. Comparing base (316d621) to head (8356e9e).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #18003      +/-   ##
==========================================
+ Coverage   80.48%   80.50%   +0.01%     
==========================================
  Files        1496     1496              
  Lines      196646   196646              
  Branches     2817     2817              
==========================================
+ Hits       158274   158311      +37     
+ Misses      37851    37814      -37     
  Partials      521      521              

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[ritchie46]

Thanks @deanm0000