Update plugin firebase-appdistribution to v5.2.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
com.google.firebase.appdistribution	5.2.0 → 5.2.1

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Configuration

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 46.43%. Comparing base (0547cdd) to head (0fba280).
⚠️ Report is 2 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #4318      +/-   ##
===========================================
- Coverage    46.44%   46.43%   -0.01%     
===========================================
  Files          436      436              
  Lines        11770    11770              
  Branches      2038     2038              
===========================================
- Hits          5466     5465       -1     
  Misses        5720     5720              
- Partials       584      585       +1     

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