fix: calculate limit issue

[Itshyphen]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.06%. Comparing base (ae14740) to head (0df8a5a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #66      +/-   ##
==========================================
+ Coverage   92.05%   92.06%   +0.01%     
==========================================
  Files          24       24              
  Lines        2355     2358       +3     
==========================================
+ Hits         2168     2171       +3     
  Misses        187      187              

Flag	Coverage Δ
rust	92.06% <100.00%> (+0.01%)	⬆️

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Files	Coverage Δ
contracts/cw-common/src/rate_limit.rs	97.10% <100.00%> (+0.13%)	⬆️