[Fix] shuffle Flyingchairs dataset cfg for raft

[MeowZheng]

as tittle

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 68.50%. Comparing base (7557e48) to head (fe34ad7).
⚠️ Report is 49 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #105      +/-   ##
==========================================
- Coverage   68.58%   68.50%   -0.09%     
==========================================
  Files          89       89              
  Lines        4998     4998              
  Branches      713      713              
==========================================
- Hits         3428     3424       -4     
- Misses       1459     1464       +5     
+ Partials      111      110       -1     

Flag	Coverage Δ
unittests	68.50% <ø> (-0.09%)	⬇️

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