chore(gradle): Drop a trailing slash for consistency

[fviernau]

Context: #8739.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.10%. Comparing base (bbbb900) to head (964c729).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #9655   +/-   ##
=========================================
  Coverage     68.10%   68.10%           
  Complexity     1294     1294           
=========================================
  Files           249      249           
  Lines          8841     8841           
  Branches        922      922           
=========================================
  Hits           6021     6021           
  Misses         2432     2432           
  Partials        388      388           

Flag	Coverage Δ
funTest-docker	65.14% <ø> (ø)
funTest-non-docker	33.28% <ø> (ø)
test-ubuntu-24.04	35.91% <ø> (ø)
test-windows-2022	35.88% <ø> (ø)

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