Humanize another invalid input error

[mjh1]

We saw this error from mediaconvert for a 'bounce' variable resolution video: https://storage.googleapis.com/lp-us-catalyst-vod-com/hls/source/transfer/dfhhehfe

[codecov]

Codecov Report

Merging #174 (457c8e9) into main (ededb39) will increase coverage by 0.04061%.
The diff coverage is 100.00000%.

@@                 Coverage Diff                 @@
##                main        #174         +/-   ##
===================================================
+ Coverage   11.95201%   11.99262%   +0.04061%     
===================================================
  Files             14          14                 
  Lines           2167        2168          +1     
===================================================
+ Hits             259         260          +1     
  Misses          1889        1889                 
  Partials          19          19                 

Impacted Files	Coverage Δ
task/runner.go	21.86837% <100.00000%> (+0.16624%)	⬆️

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Impacted Files	Coverage Δ
task/runner.go	21.86837% <100.00000%> (+0.16624%)	⬆️