fix(deps): update dependency com.diffplug.spotless:spotless-plugin-gradle to v8.4.0

[mend-for-github-com]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.diffplug.spotless:spotless-plugin-gradle	8.3.0 → 8.4.0

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Configuration

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.57%. Comparing base (0c34e9f) to head (4058dc2).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1335      +/-   ##
============================================
- Coverage     77.62%   77.57%   -0.06%     
  Complexity     1267     1267              
============================================
  Files           106      106              
  Lines          5904     5904              
  Branches        612      612              
============================================
- Hits           4583     4580       -3     
- Misses         1025     1029       +4     
+ Partials        296      295       -1     

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