fix: Fix conference change event model

[DmitryVeko]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (b3bc1eb) to head (180c19a).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #537   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          130       130           
  Lines         4964      4964           
  Branches       212       212           
=========================================
  Hits          4964      4964           

Flag	Coverage Δ
unittests	100.00% <100.00%> (ø)

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