Updated the notification string for incoming calls

[Velin92]

fixes #3724

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 78.78%. Comparing base (9706985) to head (306036f).
Report is 1 commits behind head on develop.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
NSE/Sources/NotificationContentBuilder.swift	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3723      +/-   ##
===========================================
+ Coverage    78.74%   78.78%   +0.03%     
===========================================
  Files          792      792              
  Lines        68214    68214              
===========================================
+ Hits         53716    53740      +24     
+ Misses       14498    14474      -24     

Flag	Coverage Δ
unittests	70.40% <0.00%> (+0.03%)	⬆️

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[pixlwave]

LGTM 👍