Make switch more clear

[cristaloleg]

Found by go-critic defaultCaseOrder checker

Log:

models/review.go:41:2 defaultCaseOrder consider to make `default` case as first or as last case

[codecov-io]

Codecov Report

Merging #5119 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master   #5119      +/-   ##
=========================================
+ Coverage    37.4%   37.4%   +<.01%     
=========================================
  Files         307     307              
  Lines       45552   45551       -1     
=========================================
+ Hits        17037   17038       +1     
+ Misses      26060   26058       -2     
  Partials     2455    2455

Impacted Files	Coverage Δ
models/review.go	63.3% <100%> (-0.27%)	⬇️
models/repo_indexer.go	52.96% <0%> (+0.84%)	⬆️

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