feat: bump slevomat cs to v8.21.1

[simPod]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.45%. Comparing base (9617b46) to head (e7f3db9).
⚠️ Report is 1 commits behind head on 7.0.x.

Additional details and impacted files

@@           Coverage Diff           @@
##            7.0.x     #168   +/-   ##
=======================================
  Coverage   95.45%   95.45%           
=======================================
  Files           3        3           
  Lines         264      264           
=======================================
  Hits          252      252           
  Misses         12       12           

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