chore: update flakebox to remove a workaround

[dpc]

Re (workaround): #4228

[codecov]

Codecov Report

Attention: 35 lines in your changes are missing coverage. Please review.

Comparison is base (6f1176e) 57.87% compared to head (3308799) 57.99%.
Report is 7 commits behind head on master.

Files	Patch %	Lines
fedimint-cli/src/client.rs	0.00%	16 Missing ⚠️
fedimint-client/src/module/mod.rs	0.00%	13 Missing ⚠️
modules/fedimint-mint-client/src/lib.rs	96.18%	5 Missing ⚠️
fedimint-load-test-tool/src/common.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4245      +/-   ##
==========================================
+ Coverage   57.87%   57.99%   +0.12%     
==========================================
  Files         197      197              
  Lines       43420    43569     +149     
==========================================
+ Hits        25129    25270     +141     
- Misses      18291    18299       +8     

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