Fix uploading XLSX files

[frombetelgeuse]

No description provided.

[codecov]

Codecov Report

Merging #377 (40f54ab) into cli3 (f328475) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##               cli3     #377   +/-   ##
=========================================
  Coverage     58.15%   58.15%           
  Complexity      878      878           
=========================================
  Files           143      143           
  Lines          4186     4186           
  Branches        624      624           
=========================================
  Hits           2434     2434           
  Misses         1457     1457           
  Partials        295      295           

Impacted Files	Coverage Δ
...wdin/cli/commands/actions/UploadSourcesAction.java	52.54% <100.00%> (ø)

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