chore: Add event attachments to README.md

[kesselb]

Close #5119

Local version of #5119

Picked up Simon's suggestion to flip the order.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 23.33%. Comparing base (7ed3e6e) to head (56ee073).
Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #6530   +/-   ##
=========================================
  Coverage     23.33%   23.33%           
  Complexity      453      453           
=========================================
  Files           248      248           
  Lines         11777    11777           
  Branches       2246     2257   +11     
=========================================
  Hits           2748     2748           
  Misses         8705     8705           
  Partials        324      324           

Flag	Coverage Δ
javascript	14.95% <ø> (ø)
php	59.29% <ø> (ø)

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