fix: Fix premature scaledown

[dthomson25]

No description provided.

[codecov]

Codecov Report

Merging #365 into master will decrease coverage by 0.27%.
The diff coverage is 48.88%.

@@            Coverage Diff            @@
##           master    #365      +/-   ##
=========================================
- Coverage   83.97%   83.7%   -0.28%     
=========================================
  Files          70      70              
  Lines        6528    6534       +6     
=========================================
- Hits         5482    5469      -13     
- Misses        750     772      +22     
+ Partials      296     293       -3

Impacted Files	Coverage Δ
rollout/canary.go	86.23% <100%> (-0.12%)	⬇️
rollout/bluegreen.go	77.67% <45.16%> (-4.77%)	⬇️
rollout/replicaset.go	65.38% <50%> (-9.62%)	⬇️

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