fix(deps): update github.com/alecthomas/units commit hash to b94a6e3

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
github.com/alecthomas/units	require	digest	59d0afb -> b94a6e3

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[codecov-commenter]

Codecov Report

Merging #270 (6fddd09) into master (d423034) will increase coverage by 0.21%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #270      +/-   ##
==========================================
+ Coverage   63.79%   64.00%   +0.21%     
==========================================
  Files          79       79              
  Lines        5640     5640              
==========================================
+ Hits         3598     3610      +12     
+ Misses       1684     1673      -11     
+ Partials      358      357       -1     

Impacted Files	Coverage Δ
tcp/clientobserve.go	71.56% <0.00%> (+0.98%)	⬆️
net/blockwise/blockwise.go	70.20% <0.00%> (+1.20%)	⬆️
pkg/cache/cache.go	74.00% <0.00%> (+10.00%)	⬆️

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